High cycle fatigue behavior of Ti-5Al-5Mo-5V-3Cr-1Zr titanium alloy with bimodal microstructure

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• 作者：Chaowen Huang^a ; ^b ; ^{huangchaowen318@163.com} ; Yongqing Zhao^a ; ^b ; ^{trc@c-nin.com} ; Shewei Xin^b ; Wei Zhou^b ; Qian Li^b ; Weidong Zeng^a ; Changsheng Tan^c
• 关键词：Ti&ndash ; 55531 titanium alloy ; Microstructure ; High&ndash ; cycle fatigue ; Crack initiation ; Crack propagation
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：25 February 2017
• 年：2017
• 卷：695
• 期：Complete
• 页码：1966-1975
• 全文大小：5341 K
• 卷排序：695

文摘

Ti-55531 alloy with BM presents an excellent HCF strength (∼656 MPa). Slip lines, twins and dislocation free zones exist in fatigued specimens. Fatigue microcracks mainly nucleate at αp/βtrans interfaces and at αp phase. Fatigue cracks growth with a smooth path results from fine αs lamellae in βtrans. HCF damage of the alloy is controlled by both αp particles and αs platelets.