| A New Aging Treatment Way for Near α High Temperature Titanium Alloys | |
| Alternative Title | A New Aging Treatment Way for Near α High Temperature Titanium Alloys |
| Jun Zhang1; Na Peng1; Qingjiang Wang1; Xinan Wang1 | |
| 2009 | |
| Source Publication | 材料科学技术学报：英文版
 |
| ISSN | 1005-0302 |
| Volume | 000Issue:004Pages:454-458 |
| Abstract | Two near α titanium alloys, Ti-5.6Al-4.8Sn-2.0Zr-1Mo-0.35Si （1#） and Ti-6.0AI-4.8Sn-2.0Zr-1Mo-0.35Si （2#）, were solution-treated in the upper α＋β phase fields, and the duplex mixture microstructures consisting of the less volume fraction primary α phase （αp） and the transformed β phase （βt） were obtained. The aging treatments were carried out at 700℃ for 1# alloy and 760℃ for 2# alloy under varied terms, respectively. It guaranteed α2 ordered phase to precipitate only in αp but not in βt for the two alloys. The slower precipitation and growth of the α2 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℃ were investigated. Prolonging aging time did not predominantly change the tensile strength and ductility for the two alloys. The 600℃/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 i# 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 α2 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 α2 ordered phase and silicide can be achieved by properly selecting aging temperature and time. |
| Other Abstract | Two near α titanium alloys, Ti-5.6Al-4.8Sn-2.0Zr-1Mo-0.35Si （1#） and Ti-6.0AI-4.8Sn-2.0Zr-1Mo-0.35Si （2#）, were solution-treated in the upper α＋β phase fields, and the duplex mixture microstructures consisting of the less volume fraction primary α phase （αp） and the transformed β phase （βt） were obtained. The aging treatments were carried out at 700℃ for 1# alloy and 760℃ for 2# alloy under varied terms, respectively. It guaranteed α2 ordered phase to precipitate only in αp but not in βt for the two alloys. The slower precipitation and growth of the α2 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℃ were investigated. Prolonging aging time did not predominantly change the tensile strength and ductility for the two alloys. The 600℃/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 i# 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 α2 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 α2 ordered phase and silicide can be achieved by properly selecting aging temperature and time. |
| Keyword | 高温钛合金 时效处理 机械性质 老化处理 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:3652588 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/156339 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.沈阳大学 2.中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Jun Zhang,Na Peng,Qingjiang Wang,et al. A New Aging Treatment Way for Near α High Temperature Titanium Alloys[J]. 材料科学技术学报：英文版,2009,000(004):454-458. |
| APA | Jun Zhang,Na Peng,Qingjiang Wang,&Xinan Wang.(2009).A New Aging Treatment Way for Near α High Temperature Titanium Alloys.材料科学技术学报：英文版,000(004),454-458. |
| MLA | Jun Zhang,et al."A New Aging Treatment Way for Near α High Temperature Titanium Alloys".材料科学技术学报：英文版 000.004(2009):454-458. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment