A New Aging Treatment Way for Near alpha High Temperature Titanium Alloys

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	A New Aging Treatment Way for Near alpha High Temperature Titanium Alloys
	J. Zhang; N. Peng; Q. J. Wang; X. N. Wang
	2009
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	25 期号:4 页码:454-458
摘要	Two near a titanium alloys, Ti-5.6Al-4.8Sn-.0Zr-1Mo-0.35Si (1#) and Ti-6.0Al-4.8Sn-2.0Zr-1Mo-0.35Si (2#), were solution-treated in the upper alpha+beta phase fields, and the duplex mixture microstructures consisting of the less volume fraction primary a phase (alpha(p)) and the transformed beta phase (beta(t)) were obtained. The aging treatments were carried out at 700 degrees C for 1# alloy and 760 degrees C for 2# alloy under varied terms, respectively. It guaranteed alpha(2) ordered phase to precipitated only in ap but not in beta(t) for the two alloys. The slower precipitation and growth of the a2 ordered phase and silicide was observed in 1# alloy in comparison with 2# alloy. The mechanical properties including tensile strength and ductility, the creep and lasting properties at 600 degrees C were investigated. Prolonging aging time did not predominantly change the tensile strength and ductility for the two alloys. The 600 degrees C/100 h thermal exposure caused a notable decrease of tensile ductility in 2# alloy though no distinct decrease could be observed in 1# alloy after. the thermal exposure. The lasting property of 1# alloy was increased with prolonging aging time and finally was equal to or even better than that of 2# alloy. Nevertheless, no evident increase emerged in 2# alloy with prolonging aging time. Similarly, the creep property of 1# alloy monotonously increased with increasing aging time and finally was equal to or even better than that of 2# alloy. No evident increase could be observed for 2# alloy. It can be deduced that the overgrowth of alpha(2) ordered phase and silicide is unable to enhance hot strength properties but cause an unacceptable damage to tensile ductility. The optimum equilibrium of the comprehensive properties depending on the proper control Of alpha(2) ordered phase and silicide can be achieved by properly selecting aging temperature and time.
部门归属	[zhang, jun; peng, na; wang, xi'nan] shenyang univ, dept mat sci & engn, shenyang 110044, peoples r china. [wang, qingjiang] chinese acad sci, inst met res, shenyang 110016, peoples r china.;zhang, j (reprint author), shenyang univ, dept mat sci & engn, shenyang 110044, peoples r china;zhjun11@sohu.com
关键词	Titanium Alloy Mechanical Property Aging Treatment Precipitation Phase
URL	查看原文
WOS记录号	WOS:000268775200006
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32548
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Zhang,N. Peng,Q. J. Wang,et al. A New Aging Treatment Way for Near alpha High Temperature Titanium Alloys[J]. Journal of Materials Science & Technology,2009,25(4):454-458.
APA	J. Zhang,N. Peng,Q. J. Wang,&X. N. Wang.(2009).A New Aging Treatment Way for Near alpha High Temperature Titanium Alloys.Journal of Materials Science & Technology,25(4),454-458.
MLA	J. Zhang,et al."A New Aging Treatment Way for Near alpha High Temperature Titanium Alloys".Journal of Materials Science & Technology 25.4(2009):454-458.