Effect of boron and carbon addition on microstructure and mechanical properties of metastable beta titanium alloys

被引：40

作者：

Banoth, Ravinaik ^{[1
]}

Sarkar, Rajdeep ^{[2
]}

Bhattacharjee, Amit ^{[2
]}

Nandy, T. K. ^{[2
]}

Rao, G. V. S. Nageswara ^{[1
]}

机构：

[1] Natl Inst Technol, Dept Met & Mat Engn, Warangal 506004, Andhra Pradesh, India

[2] Def Met Res Lab, Hyderabad 500058, Andhra Pradesh, India

来源：

MATERIALS & DESIGN | 2015年 / 67卷

关键词：

beta-Titanium alloys; Boron and carbon; Solution treatment; Ageing; Electron microscopy; Tensile testing; AEROSPACE INDUSTRY; BEHAVIOR; TI-15-3; TENSILE; STRAIN;

D O I：

10.1016/j.matdes.2014.11.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of boron and carbon on microstructure and mechanical properties of beta titanium alloys Ti-15V-3Cr-3Mo-3Sn, Ti-10V-2Fe-3Al, and Ti-5V-5Mo-5Al-3Cr has been studied in detail. The addition of boron and carbon results in refinement of beta grain size and alpha-precipitates during ageing. While the hardness and tensile strength increase with the addition of boron and carbon, the elongation to failure deteriorates. The increase in strength is attributed to a synergistic effect of grain refinement and load sharing by TiB and TiC particles; whereas decrease in elongation is due to the brittleness of these hard particles. Ageing results in increase in strength and decrease in elongation as compared to solution treatment condition. In this case, the effect of boron and carbon is marginal. Further enhancement in the properties can be achieved by fine tuning heat treatment parameters. Multiple slopes are observed in log-log plots of true stress-true strain thereby implying different deformation mechanisms over a large range of plastic deformation. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：50 / 63

页数：14

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