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Fe-20Mn-12Cr-3Ni-3Si 합금의 인장성질에 미치는 냉간가공의 영향
정종민 ( Jong-min Jung ),김권후 ( Kwon-hoo Kim ) 한국열처리공학회 2021 熱處理工學會誌 Vol.34 No.3
This study was carried out to investigate the effect of transformation induced martensite on the tensile properties of Fe-20Mn-12Cr-3Ni-3Si alloy. Α’ and ε-martensite were formed by cold rolling, and these martensite were formed with according to the specific direction, surface relief and partially intersection. With an increasing degree of cold rolling, amount of α’-martensite was slowly increased, whereas amount of ε-martensite was rapidly increased. Volume fraction of ε-martensite formed by cold working was large than α’-martensite. Tensile strength was rapidly increase and elongation was rapidly decreased with an increasing of degree of cold rolling. This means that tensile strengh and elongation was greatly influenced by the volume fraction of ε-martensite formed by cold rolling then α’-martensite. (Received April 22, 2021; Revised April 29, 2021; Accepted May 6, 2021)
열간 압연 후 어닐링처리한 Mg 합금의 인장강도와 감쇠능과의 관계
이규현 ( Gyu Hyun Lee ),오은지 ( Eun Ji Oh ),김권후 ( Kwon Hoo Kim ),김재남 ( Jae Nam Kim ),강창룡 ( Chang Yong Kang ) 한국열처리공학회 2014 熱處理工學會誌 Vol.27 No.6
In this study, the relationship between strength and damping capacity of annealed magnesium alloysafter hot rolling was investigated. The microstructure of hot rolled magnesium consisted of dendrite structure andMg17Al12 compounds precipitated along the grain boundary. The dendrite structure was dissipated, Mg17Al12 compoundswas decomposed by annealing, and then its dissolved in α-Mg. With an increasing the annealing temperatureand time, strength was slowly decreased and damping capacity was slowly increased by the growth of grainsize and decreasing of defects induced by hot rolling. In annealing treatmented magnesium alloys after hot rolling,damping capacity was decreased rapidly with an increase of strength. There was on proportional relationshipbetween tensile strength, and damping capacity.