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Inhomogeneous Deformation of Interstitial Free Steel during the High Pressure Torsion Process
Yuepeng Song, Miaomiao Chen, Wenke Wang, Baoyan Xu, Dongsheng Gao, Shuai Zhang, Hyoung Seop Kim
Korean J. Met. Mater. 2017;55(10):710-715.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.710

Abstract
Interstitial free (IF) steel disks were subjected to various degrees of revolution during application of the high-pressure torsion (HPT) process, and the resulting distributions of hardness and microstructure during the early torsion stage of high-pressure torsion (HPT) were investigated using experimental and simulation approaches. The results indicated that the deformation..... More

      
Age Hardening and Re-crystallization Softening of a CoCrFeMnNi High Entropy Alloy
고엔트로피 합금강의 시효경화 및 재결정 연화현상
Byung Hak Choe, Hyeon Su Jang, Hyoung Seop Kim, Jong Un Moon
최병학, 장현수, 김형섭, 문종언
Korean J. Met. Mater. 2017;55(10):684-688.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.684

Abstract
Age hardening and re-crystallization softening of a type of high entropy alloy, CoCrFeMnNi, was performed to investigate the relationship between microstructure and the property of mechanical hardness. Equiatomic CoCrFeMnNi was produced by casting followed by homogenizing, cold rolling and post heat treatments. TEM analysis revealed that the microstructure of the..... More

      
Fabrication of the High-Entropy Alloys and Recent Research Trends: A Review
고엔트로피 합금의 제조 방법과 연구 동향: 리뷰
Dami Yim, Hyoung Seop Kim
임다미, 김형섭
Korean J. Met. Mater. 2017;55(10):671-683.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.671

Abstract
Abstract: High-entropy alloys (HEAs), which are defined as a single phase crystalline solid solution with the composition of each constituent element in the range of 5-35 at%, have been the subject of intensive study in the last decade. Most of the HEA research is focused on alloy design, microstructural characterization,..... More

         Cited By 1
Effects of Friction and Anvil Design on Plastic Deformation during the Compression Stage of High-Pressure Torsion
Yuepeng Song, Miaomiao Chen, Baoyan Xu, Dongsheng Gao, Jing Guo, Lingfeng Xu, Zheng Wang, Hyoung Seop Kim
Korean J. Met. Mater. 2016;54(11):831-837.   Published online 2016 Nov 5
DOI: https://doi.org/10.3365/KJMM.2016.54.11.831

Abstract
Herein, we report the results of our investigation on the effect of friction and anvil design on the heterogeneous plastic-deformation characteristics of copper during the compressive stage of high-pressure torsion (HPT), using the finite element method. The results indicate that the friction and anvil geometry play important roles in the..... More

         Cited By 3
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