| Ti-12Co-5Al合金高速低温超塑变形 |
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| 引用本文： | 刘庆, 胡小华, 杨王玥, 陈国良. Ti-12Co-5Al合金高速低温超塑变形[J]. 工程科学学报, 1993, 15(3): 267-271. DOI: 10.13374/j.issn1001-053x.1993.03.023 |
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| 作者姓名： | 刘庆 胡小华 杨王玥 陈国良 |
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| 摘 要： | 采用合适的冶炼及形变热处理工艺获得了具有x-Ti+Ti2Co金属间化合物双相超细组织的Ti-12Co-5Al合金板材。该合金呈现出优异的高速低温超塑性,在700℃的较低温度和3×10-2s-1的高应变速率条件下获得了延伸率为1550%的超塑性。微观组织研究表明,超塑变形促进了Ti2Co粒子的长大和形状变化,且在延伸率达500%时试样中仍无孔洞产生。
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| 关 键 词： | Ti-Co-Al合金 超塑性 变形机制 |
| 收稿时间： | 1992-11-08 |
Superplastic Deformation at High Strain Rate and Low Temperature of A Ti-12Co-5Al Allog |
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| Liu Qing, Hu Xiaohua, Yang Wangyue, Chen Guoliang. Superplastic Deformation at High Strain Rate and Low Temperature of A Ti-12Co-5Al Allog[J]. Chinese Journal of Engineering, 1993, 15(3): 267-271. DOI: 10.13374/j.issn1001-053x.1993.03.023 |
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| Authors: | Liu Qing Hu Xiaohua Yang Wangyue Chen Guoliang |
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| Abstract: | A Ti-12Co-5A1 alloy sheet with an ultra fine α-Ti+Ti2Co microstructu was obtained after a proper melting process and thermomechanical treatment. The all under this state exhibits very large superplastic elongation at relatively low temperature ar high strain rates. The elongation more than 1 500% was obtained at a strain rate of 3×10-2s-1 and 700℃. The superplastic deformation induced the size increase and shape chan of Ti2Co intermetallic particles. No cavity was found in the specimen after superplast deformation to 500%. |
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| Keywords: | Ti-Co-Al alloy superpiasticity deformation mechanism |
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