Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics
Online ISSN : 2424-2837
セッションID: OS11W0187
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OS11W0187 Effects of frictional wear characteristics and microstructure on fretting fatigue strength of high workable titanium alloy, Ti-4.5Al-3V-2Mo-2Fe
Junji TakedaMitsuo NiinomiToshikazu Akahori
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The effects of frictional wear characteristics and microstructural factors such as volume fraction and diameter of primary α phase on fretting fatigue strength of Ti-4.5Al-3V-2Mo-2Fe conducted with various annealing treatments were investigated in this study. Fretting fatigue life of Ti-4.5Al-3V-2Mo-2Fe is hardly affected by the volume fraction and diameter of primary α phase in the low cycle fretting fatigue region. The fretting fatigue limit of Ti-4.5Al-3V-2Mo-2Fe tends to increase with decreasing the volume fraction and average diameter of primary α phase. However, when volume fraction and average diameter of primary α phase are below certain values, the fretting fatigue limit is lowered by coarsening of acicular α phase, which precipitates in β phase region. The weight loss of Ti-4.5Al-3V-2Mo -2Fe tends to increase with decreasing the hardness. The fretting fatigue life of Ti-4.5Al-3V-2Mo-2Fe tends to decrease with increasing the estimated weight loss of the slip region and increasing the depth of the crack growth zone caused by the contact pressure.
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© 2003 一般社団法人 日本機械学会
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