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저합금강과 오스테나이트 스테인리스강의버터링 이종용접부에서의 기계적 성질의 거동
양인수(In-Su Yang),탁영지(Young-ji Tak),김성재(Seong-jae Kim),오환섭(Hwan-Sup Oh) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
It is important to evaluate strength of dissimilar weld zone to use dissimilar materials safely. This study<br/> examines mechanical characteristics of dissimilar weld zone between low alloy steel and austenitic stainless<br/> steel that satisfies welding related requirements of ASME Code, experimentally reviews metallurgical and<br/> mechanical properties at and adjacent to weld interface. It is confirmed that hardness singularity occurs at the<br/> weld interface, and that optimum buttering thickness is more than 5㎜from view points of tensile & yield<br/> strength. From a macroscopic view, brittle fracture characteristics is observed in buttering weld zone by tensile test.
오환섭(Hwan sup Oh),김경열(Kyung yul Kim),박종찬(Jong chan Park),박상정(Sang jung Park),탁영지(young ji Tak) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_3
This study is very important to define the characteristic of thermal fatigue for tungsten filament in the view of micro-order scale. As the result of this study about thermal fatigue for tungsten fIlament, An empirical formula, such as V=30.20- 3.59logN, is made from the relation between change of voltage and number of cycle. New fracture mechanism of thermal fatigue is suggested for tungsten filament's fractography.