Martensitic microstructures and mechanical properties of as-quenched metastable β-type Ti-Mo alloys

被引：50
作者：
Wang, C. H. [1 ,2 ,3 ]
Yang, C. D. [1 ,2 ,3 ]
Liu, M. [1 ,2 ,3 ]
Li, X. [1 ,2 ,3 ]
Hu, P. F. [4 ]
Russell, A. M. [5 ]
Cao, G. H. [1 ,2 ,3 ]
机构：
[1] Shanghai Univ, State Key Lab Adv Special Steel, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[2] Shanghai Univ, Shanghai Key Lab Adv Ferromet, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[3] Shanghai Univ, Sch Mat Sci & Engn, 149 Yanchang Rd, Shanghai 200072, Peoples R China
[4] Shanghai Univ, Lab Microstruct, 99 Shangda Rd, Shanghai 200444, Peoples R China
[5] Iowa State Univ, Dept Mat Sci & Engn, Div Mat Sci & Engn, USDOE,Ames Lab, Ames, IA 50011 USA
来源：
JOURNAL OF MATERIALS SCIENCE | 2016年 / 51卷 / 14期
基金：
中国国家自然科学基金;
关键词：
ELASTIC-DEFORMATION-BEHAVIOR; OMEGA PHASE-TRANSFORMATION; NB-ZR-TA; TITANIUM-ALLOYS; STRENGTHENING MECHANISMS; TENSILE PROPERTIES; FE; NUCLEATION; STABILITY; MODES;
D O I：
10.1007/s10853-016-9976-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microstructures and tensile properties were investigated in metastable beta-type Ti-10Mo, Ti-15Mo, and Ti-20Mo alloys after solution treatment. In addition to beta phase, different martensitic structures with various sizes and morphologies were found in these alloys. In the Ti-10Mo alloy, acicular alpha aEuro(3) plates were uniformly distributed in the beta matrix. Transmission electron microscopy (TEM) revealed {111} alpha aEuro(3)-type twins had formed in alpha aEuro(3) plates, and the orientation relationship between the beta and alpha aEuro(3) is close to (110) beta//(001) alpha aEuro(3), () beta//(110) alpha aEuro(3), and [] beta//[] alpha aEuro(3). In the Ti-15Mo alloy, nanoparticles of athermal omega phase containing {112} beta-type twins were observed in the beta matrix. Smaller omega particles were found in the Ti-20Mo alloy than in the Ti-15Mo alloy. When tensile tested, the Ti-10Mo and Ti-15Mo alloys exhibited large plastic strains of 24 and 29 %, respectively, with ultimate tensile stresses of 756 and 739 MPa. The Ti-20Mo alloy displayed a higher ultimate tensile stress of 792 MPa but much smaller plastic strain (2 %). Although beta phase dominates in all the metastable beta-type Ti-Mo alloys, the nanostructured martensites also play an important role in the mechanical properties of the alloys.
引用
收藏
页码：6886 / 6896
页数：11
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