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Effect of Pre-Aging Treatment on the Mechanical Properties of Cold Rolled Cu-6 wt% Ni-1.4 wt% Si Alloy
Cu-6 wt% Ni-1.4 wt% Si 합금의 압연 후 기계적 성질에 미치는 시효전 처리 영향
Sang Jin Lee, Hyeon Seok Shin, Eun-Ae Choi, Jee Hyuk Ahn, Yoonsuk Choi, Sangshik Kim, Jehyun Lee, Seung Zeon Han
이상진, 신현석, 최은애, 안지혁, 최윤석, 김상식, 이재현, 한승전
Korean J. Met. Mater. 2020;58(7):488-494.   Published online 2020 Jul 5
DOI: https://doi.org/10.3365/KJMM.2020.58.7.488

Abstract
Cu-Ni-Si alloys were strengthened by Ni2Si intermetallic compound precipitation in a Cu matrix during aging. The Cu-6 wt% Ni-1.4wt%Si alloy was prepared by water quenching (solution treatment) or air cooling (homogenization treatment) after heating 980 oC for 2 hours and aging at 500 oC for 6 hours. After maintaining a..... More

                           Cited By 3
Effect of Cr and N on Stress Corrosion Cracking Behavior of Fe-18Mn Steel
Fe-18Mn강의 응력부식균열 거동에 미치는 크롬과 질소의 영향
Heesoo Choi, Sumin Kim, Hyokyung Sung, Sung-Joon Kim, Sangshik Kim
최희수, 김수민, 성효경, 김성준, 김상식
Korean J. Met. Mater. 2019;57(10):624-631.   Published online 2019 Sep 6
DOI: https://doi.org/10.3365/KJMM.2019.57.10.624

Abstract
High-Mn steels developed for offshore industries require good resistance to stress corrosion cracking (SCC) in seawater. Elements like Cr and N are often added to improve the resistance to SCC. In this study, the SCC behavior of Fe18Mn3Cr0.1N and Fe19Mn19Cr0.6N steels in artificial seawater was examined. Slow strain rate tests..... More

                           Cited By 4
Effects of Exposure Temperature on Tensile and Charpy Impact Properties of the 7xxx Aluminum Alloy for Aerospace Applications
항공용 7xxx계 알루미늄 합금의 고온 노출 온도가 인장 및 샤르피 충격 특성에 미치는 영향
Woojin An, Dohee Kim, Bong-Hwan Kim, Shae Kwang Kim, Sangshik Kim, Hyokyung Sung
안우진, 김도희, 김봉환, 김세광, 김상식, 성효경
Korean J. Met. Mater. 2019;57(4):214-226.   Published online 2019 Apr 5
DOI: https://doi.org/10.3365/KJMM.2019.57.4.214

Abstract
Aluminum alloys have been widely used for aerospace applications due to their high strength and lightweight. New demand is growing for aluminum alloys with high temperature mechanical properties that can sustain plastic deformation at high temperature. In this study, correlations among microstructure, tensile properties and Charpy impact properties were analyzed..... More

                           Cited By 3
Effect of Microstructural Factors on Fatigue and Fatigue Crack Propagation Behaviors of Mill-Annealed Ti-6Al-4V Alloy
미세조직적 인자가 밀소둔된 Ti-6Al-4V 합금의 피로 및 피로균열전파 거동에 미치는 영향
Sanghoo Park, Sumin Kim, Daeun Lee, Soojin Ahn, Sangshik Kim
박상후, 김수민, 이다은, 안수진, 김상식
Korean J. Met. Mater. 2018;56(12):845-853.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.845

Abstract
To understand the effect of microstructural factors (i.e., the size of α phase, equiaxed vs bimodal structure) on high cycle fatigue (HCF) and fatigue crack propagation (FCP) behaviors of mill-annealed Ti-6Al- 4V (Ti64) alloy, three specimens of EQ (equiaxed)–8 (8 indicates the size of α grain), BM (bimodal)-8, and BM-..... More

                           Cited By 4
Resistance to Stress Corrosion Cracking of High-Strength 7xxx Series Aluminum Alloys in 3.5% NaCl Solution
항공용 고강도 7xxx계 알루미늄 합금의 3.5% NaCl 수용액에서의 응력부식균열 저항성
Yurim Lee, Heesoo Choi, Soojin Ahn, Cheoljoo Lee, Sangshik Kim
이유림, 최희수, 안수진, 이철주, 김상식
Korean J. Met. Mater. 2018;56(10):708-717.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.708

Abstract
For proper maintenance and inspection scheduling of aircraft, it is extremely important to measure the resistance to stress corrosion cracking (SCC) behavior of aluminum alloys used for aircraft structures. The SCC resistances of high-strength 7xxx-series aluminum alloys, including 7050-T7451, 7475-T7351 and 7140-T7451, were evaluated along longitudinal (L) and transverse (T)..... More

                           Cited By 2
Hydrogen-Affected Tensile and Fatigue Properties of Ti-6Al-4V Sheets by Superplastic Forming
Jinil Son, Junhyuk Park, Daeho Jeong, Yongnam Kwon, Masahiro Goto, Sangshik Kim
Korean J. Met. Mater. 2017;55(9):615-623.   Published online 2017 Aug 30
DOI: https://doi.org/10.3365/KJMM.2017.55.9.615

Abstract
Mill-annealed Ti-6Al-4V (Ti64) sheets were formed into rectangular shaped pans with two square recesses by the superplastic forming (SPF) technique under high pressure using commercial grade argon gas. The SPF process induced a significant decrease in the tensile ductility and high cycle fatigue (HCF) resistance of the Ti64 alloy. The..... More

      
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