Effects of Mo content on microstructure and mechanical properties of Ti-Mo alloys prepared by powder metallurgy

被引：0
|
作者：
Wang C.-F. [1 ]
Cai Q. [1 ]
Liu J.-X. [1 ,2 ]
Yan X.-F. [1 ]
机构：
[1] Beijing Institute of Technology, School of Materials Science and Engineering, Beijing
[2] Beijing Institute of Technology, China National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 02期
基金：
中国国家自然科学基金;
关键词：
mechanical properties; microstructure; powder metallurgy; Ti-Mo alloys;
D O I：
10.11817/j.ysxb.1004.0609.2022-43196
中图分类号：
学科分类号：
摘要：
Six kinds of Ti-Mo alloys with different Mo contents (mass fractions) were prepared by cold isostatic pressing followed by atmospheric pressure sintering. The effects of Mo content on microstructure and mechanical properties of the alloy were investigated, as well as the related mechanism. The results show that Ti-Mo alloys with uniform composition and relative density up to 99.26% can be prepared by powder metallurgy. With the increase of the Mo content, the relative density of powder metallurgical Ti-Mo alloys decreases gradually, and the volume fraction of β phase increases gradually. When the Mo content reaches 30%, the alloy is pure β phase. The acicular α phase, lamellar α phase, and grain boundary α phase disappear successively with the increase of Mo content. The quasi-static compressive yield strength and microhardness of the Ti-Mo alloys increase first and then decrease with the increase of Mo content, while the variation tendency of the critical fracture strain is on the contrary. The alloys with high Mo content exhibit excellent compressive plasticity. The acicular α phase is the most important factor in affecting the strength and plasticity of alloys. With the increase of the volume fraction of acicular α phase,the strength increases but the plasticity decreases. In addition, the higher the content of β phase with low hardness and body-centered cubic structure, the higher the plasticity of Ti-Mo alloys, but the strength decreases. © 2023 Central South University of Technology. All rights reserved.
引用
收藏
页码：328 / 342
页数：14
相关论文
共 35 条
  • [11] OLIVEIRA N T C, ALEIXO G, CARAM R, Et al., Development of Ti-Mo alloys for biomedical applications: Microstructure and electrochemical characterization[J], Materials Science and Engineering A, 452, 453, pp. 727-731, (2007)
  • [12] OLIVEIRA N T C, GUASTALDI A C., Electrochemical stability and corrosion resistance of Ti-Mo alloys for biomedical applications, Acta Biomaterialia, 5, 1, (2009)
  • [13] CARDOSO F F, FERRANDINI P L, LOPES E S N, Et al., Ti-Mo alloys employed as biomaterials: Effects of composition and aging heat treatment on microstructure and mechanical behavior[J], Journal of the Mechanical Behavior of Biomedical Materials, 32, (2014)
  • [14] LU J W, ZHAO Y Q, GE P, Et al., Microstructure and beta grain growth behavior of Ti-Mo alloys solution treated[J], Materials Characterization, 84, (2013)
  • [15] LU Jin-wen, GE Peng, ZHAO Yong-qing, Influence of Mo on microstructure of Ti-Mo alloys and strengthening effects, Journal of Materials Engineering, 41, 9, (2013)
  • [16] WANG C H, LIU M, HU P F, Et al., The effects of α″and ω phases on the superelasticity and shape memory effect of binary Ti-Mo alloys[J], Journal of Alloys and Compounds, 720, (2017)
  • [17] LIN Ying-wu, LU Xin, SUN Bo, Et al., Microstructure and mechanical properties of Ti-Mo alloys by powder metallurgy process, Rare metal Materials and Engineering, 46, 5, (2017)
  • [18] LIANG Dan-dan, WANG De-zhi, WANG Xiao-ying, Et al., Preparation and characteristics of the medical Ti-Mo alloys, Rare Metal Materials and Engineering, 42, 12, (2013)
  • [19] TANG Hui-ping, LIU Hai-yan, HUANG Yuan-ping, Et al., Effect of Mo addition on sintering densification and mechanic properties of P/M Ti-Mo alloy, Rare Metal Materials and Engineering, 35, 12, (2006)
  • [20] KOLLI R P, DEVARAJ A., A review of metastable beta titanium alloys, Metals, 8, 7, (2018)
1234