首页|Static Coarsening Behavior of Laser Powder Directed Energy Deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Titanium Alloy
Static Coarsening Behavior of Laser Powder Directed Energy Deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Titanium Alloy
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The static coarsening behavior of laser powder directed energy deposited Ti-6.5Al-3.5Mo-1.5Zr-0.3Si titanium alloy and its effects on the alloy's tensile properties were investigated.The static coarsening kinetics of the crab-like primary a(ap)and secondary a(as)were satisfied by the Lifshitz-Slyozov-Wagner relationships.For the coarsening of the crab-like ap,the coarsening efficiency(n)was satisfied at 0.25-0.35 for 910 ℃,whereas it was satisfied at 0.45-0.50 for 950 and 990 ℃.For the coarsening of the αs,the n was satisfied at 0.45-0.50 for 950 ℃and 990 ℃.Compared to the as-built sample,the samples heat-treated at 910 ℃/2 h/air cooled and 950 ℃/2 h/air cooled exhibited good yield strength(930-1005.5 MPa),the highest elongation(14.5％-16.6％),and the lowest anisotropic ductility(0.6％)among all samples.The crab-like αp and αs increased the crack growth resistance and decreased the fracture difference in two different directions in the samples.
Laser powder directed energy depositionTitanium alloyStatic coarseningHeat treatment
Yong Xie、Zhenyu Yan、Qingjun Zhou、Jiaming Cao、Xiaokang Liang、Peng Dong、Jiangtao Ni、Fude Wang、Guoqing Wang
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Capital Aerospace Machinery Corporation Limited,Beijing,100076,China
Wuhan National Laboratory for Optoelectronics(WNLO),Huazhong University of Science and Technology,Wuhan,430074,China
China Aerospace Science and Technology Corporation,Beijing,100076,China
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