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Fe-15Mn-0.6C-2Al 쌍정유기소성강의 상온 노치 인장파괴 거동
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유상협, 정기채, 문희범, 이경훈, 박경태
Korean J. Met. Mater.
2024;62(5):325-333. Published online 2024 May 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.5.325
Abstract
The tensile fracture behavior of an Al-bearing TWIP steel was investigated by conducting a series of tensile tests on smooth and notched specimens with different notch geometries, focusing on the effects of evolution of the stress triaxiality and the effective strain during deformation. The flow curve and digital image correlation.....
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API 강재에 첨가된 미량의 합금원소(Cr, Mo)가 CO
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포화염수 환경 내 부식거동에 미치는 영향
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윤덕빈, 방혜린, 김완근, 김성진
Korean J. Met. Mater.
2023;61(12):896-908. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.896
Abstract
This study examined the effects of minor alloying elements (Cr and Mo) on the corrosion behaviors of API grade steel in CO
2
-saturated near-neutral aqueous solutions. Various experimental and analytical methods were applied to gain insights into the underlying CO
2
corrosion mechanism of the steels. The findings revealed that steel with.....
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염수환경 내 해드필드강 용접열영향부의 부식 및 침식-부식 거동에 미치는 Cr 첨가의 영향
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진승우, 박진성, 윤덕빈, 이상철, 최종교, 오민석, 김성진
Korean J. Met. Mater.
2023;61(12):883-895. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.883
Abstract
The corrosion and erosion-corrosion behaviors in the weld heat-affected zone (HAZ) of Hadfield steels with varying Cr contents (1, 2, and 3 wt%) were examined. Various experimental methods, including electrochemical polarization, impedance, and weight loss measurements, were utilized. Two types of isothermal heat treatments were conducted in a box furnace.....
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복합화력발전 내 배열회수 보일러용 소재(탄소강 계열 및 듀플렉스 스테인리스강(UNS S32205))의 황산농도에 따른 부식거동 비교 연구
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장유성, 박진성, 홍승갑, 김성진
Korean J. Met. Mater.
2023;61(11):830-841. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.830
Abstract
This study examined the effects of sulfuric acid concentrations on the corrosion behaviors of three types of commercial steels, conventional carbon steel (SA192), sulfuric acid dew resistant steel (S-TEN), and duplex stainless steel (S32205), considered to be potential materials for the heat recovery steam generator (HRSG) in combined cycle power.....
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Korean J. Met. Mater.
2023;61(11):815-823. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.815
Abstract
The microstructure, tensile and fatigue properties of a martensitic stainless steel (MSS) plate with a thickness of 0.152 mm are investigated in this study. The microstructural properties were initially studied using electron backscatter diffraction microscopy. High dislocation densities were observed in the microstructure, along with the rolling texture revealed by.....
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전기화학적 및 고압 수소 분위기하 템퍼드 마르텐사이트강의 수소취화 특성 비교
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김상규, 김재윤, 서현주, 정환교, 박재영, 백운봉, 황병철
Korean J. Met. Mater.
2023;61(11):807-814. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.807
Abstract
The effect of hydrogen charging methods on the hydrogen embrittlement characteristics of tempered martensitic steels were discussed in terms of hydrogen diffusion behavior. Two tempered martensitic steels with different Si content were fabricated by quenching and tempering. The steel with high Si content had a lower cementite fraction because the.....
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SA508 Gr.4N Ni-Cr-Mo계 고강도 원자로압력용기용 저합금강의 템퍼취화 거동에 미치는 이상영역 열처리의 영향
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홍석민, 이초롱, 이봉상, 김홍덕, 김민철
Korean J. Met. Mater.
2023;61(10):729-740. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.729
Abstract
To analyze the effects of intercritical heat treatment on the temper embrittlement of SA508 Gr.4N steels, two model alloys with different phosphorus (P) contents were fabricated. Each sample was heat treated by applying a conventional heat treatment process (quenching-tempering) with/without an intercritical heat treatment process (IHT) and a step-cooling heat.....
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가솔린 터보차저용 Alloy1.4957 내열강의 석출 상 분석
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이종관, 이병주, 이언식
Korean J. Met. Mater.
2023;61(10):721-728. Published online 2023 Sep 25
DOI:
https://doi.org/10.3365/KJMM.2023.61.10.721
Abstract
Recently, strengthened environmental regulations have required the downsizing of gasoline engines, and as a result, demand for gasoline turbochargers has rapidly increased. The vane of a turbocharger controls the flow of gases toward the turbine, and it is manufactured by powder metallurgy due to its complex shape. Gasoline engines have.....
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Fe계 합금 용가재가 적용된 9% Ni강 용접 조인트의 미세조직과 기계적 특성에 미치는 용접 후 열처리의 영향
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최광수, 정효연
Korean J. Met. Mater.
2023;61(9):669-678. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.669
Abstract
A Fe-based filler material with the composition of Fe-20Ni-5Co-2.5Mn-0.2C was used for welding 9% Ni steel, and the effect of post-weld heat treatment on the microstructure and mechanical properties of the welded joints was investigated. Post-weld heat treatment of the welded joint was performed in the temperature range of 200.....
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해양구조용 18Mn(V, Mo)강 내 Cr 첨가가 해수환경 내 부식-마모 복합거동에 미치는 영향
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윤덕빈, 박진성, 이상철, 최종교, 김성진
Korean J. Met. Mater.
2023;61(9):633-641. Published online 2023 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.9.633
Abstract
The objective of this study was to examine the wear-corrosion behavior of 18Mn(V, Mo) steel, which had a minor amount of Cr addition (< 3 wt%), in an artificial seawater environment, and compare it to conventional carbon steel. A variety of electrochemical experiments, including linear polarization resistance, impedance spectroscopy, and.....
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Korean J. Met. Mater.
2023;61(7):459-471. Published online 2023 Jun 21
DOI:
https://doi.org/10.3365/KJMM.2023.61.7.459
Abstract
The degree to which parameters affect the spheroidization heat treatment of steel was calculated by setting the spheroidization heat treatment conditions of Cr-Mo steel and using data analysis such as S/N ratio and ANOVA. After analyzing the transformation temperatures of the steel, A
c1
and A
c3
, using a DSC, the.....
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GTAW로 용접한 초내식성 오스테나이트계 스테인리스강 (UNS S31254) 열영향부의 내식성에 미치는 Ni계 용가재의 영향
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박진성, 조동민, 홍승갑, 윤태호, 김성진
Korean J. Met. Mater.
2023;61(6):404-413. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.404
Abstract
The effect of Ni-based fillers on corrosion resistance of welded super austenitic stainless steel (SASS) was examined. The use of Ni-based fillers for gas tungsten arc welded SASS leads to the formation of fine Cr-Mo enriched phase in its weld unmixed zone, which makes it more susceptible to the localized.....
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Powder Bed Fusion(PBF) 공정의 Laser rotation 적용 여부에 따른 17-4PH 스테인리스강 소재의 미세조직 및 기계적 특성 변화
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이승호, 윤종천, 어두림, 연시모, 최균석
Korean J. Met. Mater.
2023;61(6):397-403. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.397
Abstract
17-4 precipitation hardened stainless steel (17-4PH SS) has been reported to have excellent mechanical properties and excellent corrosion resistance, and is one of the materials used and studied with the powder bed fusion (PBF) method. Powder bed fusion (PBF) is a new manufacturing technology that has recently attracted attention in.....
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6K 초극저온 인장 시험 : Fe-Mn-Cr 강의 미세조직 및 기계적 물성
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김영균, 임가람, 나영상
Korean J. Met. Mater.
2023;61(6):389-396. Published online 2023 May 18
DOI:
https://doi.org/10.3365/KJMM.2023.61.6.389
Abstract
Materials with superior cryogenic strength and good ductility are increasingly in demand for resident friendly liquid-hydrogen (20K) storage tanks. Additionally, the space industry also requires materials that retain excellent mechanical properties at extremely low temperatures. However, mechanical testing at such low temperatures is highly limited due to the difficulties in.....
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자동차용 초고강도 강재의 전기아연도금 시 음극전류 인가조건이 수소 유입, 취화 및 부식유기 수소취화 거동에 미치는 영향
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방혜린, 박진성, 김상헌, 김태엽, 오민석, 김성진
Korean J. Met. Mater.
2023;61(3):145-156. Published online 2023 Feb 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.3.145
Abstract
The effects of the electrogalvanizing conditions (a combination of plating current and time) on hydrogen infusion, embrittlement, and corrosion-induced hydrogen embrittlement (HE) behaviors of ultra-high strength steel were examined. A range of experimental and analytical methods, including electrochemical impedance spectroscopy, hydrogen permeation, polarization, and slow strain rate test, were employed......
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Web of Science 2
Crossref 1
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집속이온빔 가공 처리된 오스테나이트 스테인리스강의 표면 손상층 제어 방법
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진형하, 류이슬
Korean J. Met. Mater.
2023;61(2):137-143. Published online 2023 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2023.61.2.137
Abstract
There is substantial concern about the phase change to artificial ferrite or martensite in commercial austenitic stainless steels during intense focused-ion-beam milling. In this work, severe Ga ion milling to prepare microscale samples was found to produce thin transformed layers on the surface of austenitic stainless steel. The surface BCC.....
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분말 사출 성형된 Fe-Cr-B/316L 스테인레스강 복합재료의 미세조직과 기계적 특성에 미치는 Fe-Cr-B의 영향
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김영균, 주연아, 윤태식, 이기안
Korean J. Met. Mater.
2023;61(1):9-17. Published online 2022 Dec 28
DOI:
https://doi.org/10.3365/KJMM.2023.61.1.9
Abstract
Stainless steel-based composites (SMCs) mixed with 316L stainless steel powder and Fe-Cr-B based M alloys powder ed M) powder were manufactured using the powder injection molding (PIM) process, and their microstructure and mechanical properties were investigated. To examine the effect of M content on the properties of SMCs, the M.....
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STS 316L/A516-70N 클래드 판재의 용접방법에 따른 열영향부 형성과 기계적 물성 특성 평가 및 예측
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황철홍, 조명우, 김선환, 한두희, 유경훈, 김성웅, 김영주, 이상엽, 박준식
Korean J. Met. Mater.
2022;60(12):873-883. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.873
Abstract
Two welding methods of FCAW (Flux-cored arc welding) + FCAW, and FCAW + GTAW (Gas tungsten arc welding) were compared to identify effective routes for STS 316L/A516-70N clad stainless steel. Since the welding speed of the FCAW + GTAW welding method is slower than that of the FCAW + FCAW.....
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Web of Science 3
Crossref 4
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소부경화강의 변형 시효 및 수소취성 거동에 미치는 미세조직의 영향
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김재윤, 고석우, 황병철
Korean J. Met. Mater.
2022;60(11):811-818. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.811
Abstract
The strain aging and hydrogen embrittlement behavior of two bake hardening (BH) steels with different microstructures were investigated in this study. The single-phase BH steel was composed of fully ferrite, while the dual-phase BH steel consisted of ferrite and 3 % martensite. The BH index and aging index (AI) of.....
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Web of Science 3
Crossref 3
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극저온 연료탱크용 고망간강과 스테인리스강 316L 이종금속 용접부의 가스텅스텐아크 용접재료별 기계적 성질 및 미세조직
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조철호, 남성길, 유성훈, 최명환, 강남현
Korean J. Met. Mater.
2022;60(9):673-684. Published online 2022 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2022.60.9.673
Abstract
The gas tungsten arc (GTA) weldability of high-Mn (HMn) steel and austenitic stainless steel (STS) 316L using dissimilar metal welds (DMWs) was investigated, to fabricate a fuel tank for an LNG-fueled ship. Three types of welding fillers, HMn steel, STS 309LMo and Inconel 625, were applied to the DMWs. The.....
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Web of Science 2
Crossref 2
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Ni-Cr-Mo-V계 저합금강의 미세조직과 기계적 특성에 관한 연구
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조무근, 류성현, 김경일, 김동응, 김정인, 김경택, 김상섭, 조규섭
Korean J. Met. Mater.
2022;60(4):251-262. Published online 2022 Mar 28
DOI:
https://doi.org/10.3365/KJMM.2022.60.4.251
Abstract
Ni-Cr-Mo-V steel alloys for high-speed railway brake discs were prepared to investigate the effect of alloying element contents on the microstructure and mechanical properties. The Cr, Mo, Mn alloying elements were incorporated into the steel alloys, which contained low carbon content in the range 0.16 wt.% ~ 0.21 wt.% to.....
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Web of Science 5
Crossref 5
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슈퍼듀플렉스 스테인리스강의 반복 수정용접이 기계적 물성과 공식저항성에 미치는 영향
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김유성, 남성길, 최명환, 강남현
Korean J. Met. Mater.
2022;60(2):114-123. Published online 2022 Jan 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.2.114
Abstract
The study investigated the effect of repeated repair welding on the mechanical properties and pitting corrosion resistance of 25% Cr super duplex stainless steels (UNS S32750). The test coupons were prepared by gas tungsten arc welding (GTAW) with ER2594 filler metal and repaired 3-times at the same weld locations, where.....
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STS 347 오스테나이트계 스테인리스강의 재열균열에 미치는 석출물과 냉간 가공의 영향
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유일, 고석우, 김재윤, 황병철
Korean J. Met. Mater.
2022;60(2):102-113. Published online 2022 Jan 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.2.102
Abstract
The aim of this study was to investigate the effect of precipitates and cold working on the reheat cracking of STS 347 austenitic stainless steel. Three different heat treatments to form NbC and M
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precipitates were applied to the STS 347 austenitic stainless steel and 10% pre-strain was additionally introduced.....
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Web of Science 2
Crossref 2
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자동차용 초고강도급 강재 내 미량 첨가된 합금원소 (C, Ni, Cr 및 Mo)가 중성 수용액 환경 내 장기 부식거동에 미치는 영향
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방혜린, 박진성, 성환구, 김성진
Korean J. Met. Mater.
2022;60(1):35-45. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.35
Abstract
This study examined the effects of minor alloying elements (C, Ni, Cr, and Mo) on the long-term corrosion behaviors of ultrahigh-strength automotive steel sheets with a tensile strength of more than 1800 MPa. A range of experimental and analytical results showed that the addition of Ni, Cr, and Mo decreased.....
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Web of Science 5
Crossref 3
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Korean J. Met. Mater.
2022;60(1):26-34. Published online 2021 Dec 10
DOI:
https://doi.org/10.3365/KJMM.2022.60.1.26
Abstract
This study was conducted to evaluate the corrosion resistance and optimize the heat-treatment process of AISI 439 ferrite stainless steel silicon and tin alloys with reduced chromium. The microstructure of the specimens and deposition under each condition were analyzed. The production of oxide films was compared based on the thickness.....
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Al-Si 도금된 핫스탬핑 보론강의 볼트 프로젝션 용접시 예열 통전이 용융 거동에 미치는 영향
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김재훈, 전현욱, 천주용, 김재원, 김재득, 지창욱
Korean J. Met. Mater.
2021;59(12):893-903. Published online 2021 Nov 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.12.893
Abstract
This study evaluated the effect of preheating on early stage melting behavior of a Al-Si coated hot stamped boron steel bolt during projection welding. A large amount of heat was generated in the early stage of projection welding. Because of the large heat generation, a rapid collapse of the projection.....
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Crossref 2
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엄해원, 원주연, 신상용
Korean J. Met. Mater.
2021;59(11):781-795. Published online 2021 Oct 28
DOI:
https://doi.org/10.3365/KJMM.2021.59.11.781
Abstract
The effects of cooling rate on the microstructure and cryogenic impact toughness of coarse-grained heat-affected zone (CGHAZ) and inter-critically reheated coarse-grained HAZ (IC CGHAZ) in 9% Ni steel were investigated. CGHAZ and IC CGHAZ specimens were prepared from 9% Ni steel by controlling the cooling rate of the simulated welding.....
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1.25Cr-0.5Mo과 2.25Cr-1Mo 강의 동적 변형시효 거동에 미치는 합금원소 및 미세조직의 영향
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이요섭, 이호중, 이종현
Korean J. Met. Mater.
2021;59(11):769-780. Published online 2021 Oct 28
DOI:
https://doi.org/10.3365/KJMM.2021.59.11.769
Abstract
The effect of alloying elements and microstructure on the dynamic strain aging (DSA) behavior of 1.25Cr-0.5Mo (P11, ASTM 335Gr.P11) and 2.25Cr-1Mo (P22, ASTM 335Gr.P22) steels was investigated. For both steels, different cooling conditions such as air-cooling (AC) and oil-quenching (OQ) were applied. Tensile tests were conducted in the temperature range.....
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Web of Science 2
Crossref 2
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저온 템퍼링을 이용한 1.2 GPa급 페라이트계 경량철강 개발
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배효주, 고광규, 박형석, 정재석, 김정기, 성효경, 설재복
Korean J. Met. Mater.
2021;59(10):683-691. Published online 2021 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.10.683
Abstract
Previously reported low-Mn ferritic-based lightweight steels are potential candidates for industrial applications, however, they typically exhibit lower strength, with < 1 GPa and lower strength-ductility balance, than medium- and high-Mn austenitic lightweight steels. Herein, we introduce a low-temperature tempering-induced partitioning (LTP) treatment that avoids the strength-ductility dilemma of low-Mn ferriticbased.....
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Web of Science 2
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Korean J. Met. Mater.
2021;59(9):640-651. Published online 2021 Aug 4
DOI:
https://doi.org/10.3365/KJMM.2021.59.9.640
Abstract
The paper provides experimental details of the welding and specific examples of welding aluminum welding battery cans and conductive tabs for battery pack manufacture. In this study, we provide experimental details of a process for joining dissimilar materials used in sealing battery parts. A laser brazing technique was used for.....
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