Comparison of the Microstructure and Mechanical Properties of Ti-3573 and Ti-3873 Alloy after Solution Treatment

Yi Qin Cai; Zhuang Li; Run Qi Zhang; Jin Yu Li; Hao Xu Wang; Wen Hao Cai; Li Zhang; Qi Zhou; Xi Jun Cui

doi:10.4028/www.scientific.net/MSF.1003.60

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HomeMaterials Science ForumMaterials Science Forum Vol. 1003Comparison of the Microstructure and Mechanical...

Comparison of the Microstructure and Mechanical Properties of Ti-3573 and Ti-3873 Alloy after Solution Treatment

Abstract:

In this regard, two beta titanium alloys in the Ti-Al-Mo-V-Cr system, Ti-3Al-5Mo-7V-3Cr (Ti-3573) and Ti-3Al-8Mo-7V-3Cr (Ti-3873), have been designed. Comparison of the microstructure and mechanical properties of both alloys after solution treatment was conducted. The result shows that the β grains in Ti-3873 alloy are abnormally grown at WQ. The elongation of Ti-3573 alloy is higher than that of Ti-3873 alloy, it is related to the the smaller grain size. The Ti-3873 alloy has moderate plasticity but higher yield strength and tensile strength. Fine and deep dimples associated with ductile fracture were obtained for the Ti-3573 alloy. The fractography of the β-substrate specimens showed that the fracture mode was ductile fracture. The Ti-3873 alloy has a combination of slip and twinning during deformation. It is possible for the Ti-3573 alloy to undergo both twinning and TRIP effect upon deformation. Therefore, Ti-3573 alloy exhibited good plasticity and strength matching.