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2LCD 이송 로봇재(AC4C-T6)의 피로강도에 미치는 주조 결함의 영향
이용석(Yong-Sok Lee),심희진(Hee-Jin Shim),김정규(Jung-Kyu Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The porosity is well known to be a potent initiator of fatigue cracks in cast aluminum alloys. This article addresses the observed fatigue life of a cast AC4C-T6 aluminum alloy due to the presence of porosity. Two types of specimens containing a controlled amount of porosity were produced by the difference of melting temperature, and the amount of pore is inspected by CT-scanning. Moreover, Fatigue tests were conducted under 4 level-stress amplitude conditions, and the results of tests were stochastically assessed by 2-parameters Weibull distributions. And all of the fatigue-test specimens were observed of SEM in order to find that pore was main domain of fatigue crack in all of test specimens. Based on these results, the variation of the fatigue stregnth was evaluated by a durability analysis for LCD transfer robot. The reuslts for the fatigue life were compared with respect to the fatigue life.