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

• Published in: Materials science forum Vol. 1003; pp. 60 - 66
• Main Authors: Li, Jin Yu, Cui, Xi Jun, Zhang, Li, Cai, Wen Hao, Li, Zhuang, Wang, Hao Xu, Zhou, Qi, Zhang, Run Qi, Cai, Yi Qin
• Format: Journal Article
• Language: English
• Published: Pfaffikon Trans Tech Publications Ltd 01.07.2020
• Subjects: Alloy systems; Chromium; Deformation effects; Dimpling; Ductile fracture; Elongation; Grain size; Heat treating; Mechanical properties; Microstructure; Molybdenum; Plastic properties; Solution heat treatment; Substrates; Tensile strength; Titanium alloys; Titanium base alloys; Twinning; Ductile Fracture; Grain Size; Ti-3873 Alloys; Ti-3573; Solution Treatment
• ISSN: 0255-5476; 1662-9752; 1662-9752
• DOI: 10.4028/www.scientific.net/MSF.1003.60

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.