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MIM(금속분말사출성형)공법으로 제작된 Fe-2%Ni합금의 미세조직 및 기계적 특성
조규상(K. S. Cho),김민종(M. J. Kim),김관영(K. Y. Kim),정재옥(J. O. Jeong),박시우(S. W. Park),이기안(K. A. Lee) 한국소성가공학회 2013 한국소성가공학회 학술대회 논문집 Vol.2013 No.5
Microstructure and mechanical properties of Fe-2%Ni alloy produced by MIM(Metal Injection Molding) were investigated. Microstructure analysis, tensile test, and high cycle fatigue test were conducted. In the microstructure observation results, non-regular grain and inhomogeneous ferrite and pearlite were appeared. Non-sintered C, Si, Mn including phases were also detected. As a result of tensile test, MIMed Fe-2%Ni alloy represented yield strength of 285,5 MPa, tensile strength 605.7 MPa, and elongation 6.02%. The tensile properties of MIMed Fe-2%Ni alloy showed higher elongation and similar strengths compared to those of conventional Fe-2%Ni alloy. High cycle fatigue limit was obtained as 440 MPa. Micro-mechanisms of tensile and fatigue deformation behaviors in MIMed Fe-2%Ni alloy were also discussed based on the fractography observation.