采用TEM对Cu-0.22Cr-0.05Zr-0.05Sn合金不同形变热处理状态微观组织的演变以及时效过程中析出相的状态进行研究,并以此解释形变热处理过程中合金力学性能和导电性能的变化.结果表明,合金中存在2种析出相,分别是Cr相和Cu4Zr相.其中Cr相在时效过程中分别经历了固溶体、GP区、脱溶并与基体共格以及长大;而Cu4Zr相则以早期Cr析出相为核伴随析出,与基体半共格.由于析出相尺寸很小,且分布较为均匀,使合金具有很强的时效强化效果,经940℃固溶1h后冷加工至变形率为96%并在400℃时效4h,合金的抗拉强度和电导率可分别达到400 MPa和84%IACS.对于该合金,时效温度是决定合金综合性能的关键,而时效时间对综合性能的影响并不显著.
参考文献
[1] | Zeng K J;H(a)m(a)l(a)inen M .[J].Journal of Alloys and Compounds,1995,220:53. |
[2] | Morris M A;Leboeuf M;Morris D G .[J].Materials Science and Engineering,1994,A188:255. |
[3] | Hatakeyama M;Toyama T;Yang J et al.[J].Journal of Nuclear Materials,2009,386-388:852. |
[4] | Kapoor K;Lahiri D;Batra I S et al.[J].Materials Characterization,2005,54:131. |
[5] | Tu J P;Qi W X;Yang Y Z et al.[J].Wear,2002,249:1021. |
[6] | Wang Z Q;Zhong Y B;Cao G H et al.[J].Journal of Alloys and Compounds,2009,479:303. |
[7] | Zhan Y;Xu Y;Yu Z et al.[J].Powder Metallurgy,2006,49(03):253. |
[8] | Li H Q;Xie S S;Mi X J et al.[J].Journal of Rare Earths,2006,24(z1):367. |
[9] | 慕思国,朱永兵,郭富安,唐谟堂,向朝建,曹兴民.Cu-0.35Cr-0.15Zr合金板带的织构和性能研究[J].稀有金属材料与工程,2009(z1):588-593. |
[10] | Holzwarth U.;Stamm H. .The precipitation behaviour of ITER-grade Cu-Cr-Zr alloy after simulating the thermal cycle of hot isostatic pressing[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2000(1):31-45. |
[11] | Tang N Y;Taplin D M R;Dunlop G L .[J].Materials Science and Technology,1985,1(04):270. |
[12] | Su J H;Dong Q M;Liu P et al.[J].Materials Science and Engineering,2005,A392:422. |
[13] | Su J H;Liu P;Li H J et al.[J].Materials Letters,2007,61:4963. |
[14] | Mu S G;Guo F A;Tang Y Q et al.[J].Materials Science and Engineering,2008,A475:235. |
[15] | Huang F X;Ma J S;Ning H L et al.[J].Scripta Materialia,2003,48:97. |
[16] | Batra I S;Dey G K;Kulkarni U D et al.[J].Materials Science and Engineering,2002,A356:32. |
[17] | Batra IS.;Kulkarni UD.;Banerjee S.;Dey GK. .Microstructure and properties of a Cu-Cr-Zr alloy[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2001(2):91-100. |
[18] | Sztwiertnia K;Haessner F .[J].Materials Science Forum,1994,157-162:1469. |
[19] | Balcerek K;Marucha C Z;Rafalowicz J et al.[J].International Journal of Theoretical Physics,1993,14(06):1229. |
[20] | 胡赓祥;蔡 珣;戎咏华.材料科学基础[M].上海:上海交通大学出版社,2006:126. |
[21] | 宋维锡.金属学[M].北京:冶金工业出版社,1989:25. |
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%