标题：Impact of Cryogenic Treatment on HCF and FCP Performance of beta-Solution Treated Ti-6Al-4V ELI Biomaterial
作者：Singla, Anil Kumar; Singh, Jagtar; Sharma, Vishal S.; Gupta, Munish Kumar; Song, Qinghua; Rozumek, Dariusz; Krolczyk, Grzegorz M.
作者机构：[Singla, Anil Kumar; Singh, Jagtar] St Longowal Inst Engn & Technol, Dept Mech Engn, Longowal 148106, Punjab, India.; [Sharma, Vishal S.] Dr BR Ambe 更多
通讯作者地址：Krolczyk, GM (corresponding author), Opole Univ Technol, 76 Proszkowska St, PL-45758 Opole, Poland.
关键词：cryogenic; fatigue; titanium alloy; microstructure; crack propagation;; fractography
摘要：The poor fatigue strength of Ti-6Al-4V ELI is a main cause of failure in structural implants. In this work, Ti-6Al-4V ELI was subjected to beta-solution treatment to obtain martensite microstructure and further subjected to -196 degrees C for 24 h. Significant improvement in high cycle fatigue performance of martensite Ti-6Al-4V ELI was observed on exposure to cryogenic cycle. Resistance to fatigue crack growth of alloy was augmented in martensite structure as compared with mill annealed sample and the same was retained even after exposure to cryogenic treatment. The variation observed in fatigue behavior due to cryogenic treatment was correlated with fractography and metallurgical investigations. Improvement in high cycle fatigue performance can be attributed to a combined effect of a decrease in the size of prior beta grain, formation of massive alpha patch and its subsequent transformation into ultra-fine alpha and beta during the soaking period at -196 degrees C.