为了通过组织设计获得优异的性能,揭示TA15钛合金三态组织中的2种片层α相(次生片层α和转变β基体中细α条)的演化至关重要.采用等温压缩(在950,965和975℃),结合双重热处理(在压缩温度以下10～40℃进行第1次热处理,然后在810℃进行第2次热处理),研究了2种片层α相的演化规律.结果表明,在低于等温压缩温度以下10℃进行第1次热处理,可以获得单独分布的厚片层α相和细α条,这种细α条在第1次热处理后空冷具有集束的形态,而在第1次热处理后水冷具有针状形态.在低于等温压缩温度以下25℃进行第1次热处理,可以获得集束和网篮状的片层α相以及细α条.在低于等温压缩温度以下40℃进行第1次热处理,只能获得集束和网篮状的片层α相.另外,在第1次热处理温度相同的条件下,不同冷却方式对次生片层α相的形态影响较小.
参考文献
| [1] | Zhou YG;Zeng WD;Yu HQ .An investigation of a new near-beta forging process for titanium alloys and its application in aviation components[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):204-212. |
| [2] | Fan, X.G.;Yang, H.;Gao, P.F.;Yan, S.L..Dependence of microstructure morphology on processing in subtransus isothermal local loading forming of TA15 titanium alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:46-52. |
| [3] | Gao, P.F.;Yang, H.;Fan, X.G.;Yan, S.L..Microstructural features of TA15 titanium alloy under different temperature routes in isothermal local loading forming[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:245-252. |
| [4] | Lee E;Banerjee R;Kar S;Bhattacharyya D;Fraser HL .Selection of alpha variants during microstructural evolution in alpha/beta titanium alloy[J].Philosophical magazine: structure and properties of condensed matter,2007(22/24):3615-3627. |
| [5] | Fan, X.G.;Yang, H.;Gao, P.F. .Deformation behavior and microstructure evolution in multistage hot working of TA15 titanium alloy: On the role of recrystallization[J].Journal of Materials Science,2011(18):6018-6028. |
| [6] | Wanjara P;Jahazi M;Monajati H;Yue S .Influence of thermomechanical processing on microstructural evolution in near-alpha alloy IMI834[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1-2):300-311. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%