|Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy|
|L. N. Yang; J. R. Liu; J. Tan; Z. Y. Chen; Q. J. Wang; R. Yang
|Source Publication||Journal of Materials Science & Technology
|Abstract||An experimental study of dwell and normal cyclic fatigue behaviours was carried out using specimens from a Ti60 forging with a bimodal microstructure. Apparent decrease in the fatigue life was found under dwell fatigue condition as compared to that under normal cyclic condition. Strain produced in each cycle in dwell fatigued specimens was observed larger than that in its normal cyclic-fatigued counterparts. Interior crack initiation was found in most dwell fatigued specimens as compared to the subsurface crack initiation under normal cyclic fatigue condition. Flat and bright facets were found at crack initiation sites in both cases. The facet density is higher in dwell condition, which is consistent with the crystal orientation and Schmid factors analysis of alpha grains around secondary cracks using electron back-scattered diffraction (EBSD) methods. Dwell loading favours cleavage in alpha grains with their basal plane normals aligned no more than 15 degrees to the loading axis, which may account for its lower fatigue life according to the present study.|
; liu, jianrong
; tan, jun
; chen, zhiyong
; wang, qingjiang
; yang, rui] chinese acad sci, inst met res, shenyang 110016, peoples r china.
; wang, qj (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china.
L. N. Yang,J. R. Liu,J. Tan,et al. Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy[J]. Journal of Materials Science & Technology,2014,30(7):706-709.
L. N. Yang,J. R. Liu,J. Tan,Z. Y. Chen,Q. J. Wang,&R. Yang.(2014).Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy.Journal of Materials Science & Technology,30(7),706-709.
L. N. Yang,et al."Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy".Journal of Materials Science & Technology 30.7(2014):706-709.
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