| 置氢Ti-6Al-4V钛合金超塑性研究 | |
| 郭隆 ; 白秉哲 ; 侯红亮 ; Guo Long ; Bai Bingzhe ; Hou Hongliang | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | Ti-6Al-4V(TC4) 热置氢技术 超塑性成形 Ti-6Al-4V alloy(TC4) thermo-hydrogen processing superplastic formation(SPF) TG146.23 |
| 其他题名 | Superplasticity of Ti-6Al-4V Alloy Processed by Hydrogenation |
| 中文摘要 | 通过采用Gleeble-1500D热模拟试验机进行超塑性变形试验,研究变形温度和应变速率对置氢TC4合金超塑变形性能的影响,利用XRD,SEM和TEM分析热氢处理改善钛合金超塑性能的机制。结果表明:置氢可降低超塑成形流变应力、变形温度,提高应变速率和m值;但只有适量的氢才有利于改善钛合金超塑性,即存在一个最佳置氢量;置氢0.35%H(质量分数)的TC4合金在800℃和3×10-3s-1条件下仍有一定超塑性。分析表明,置氢钛合金超塑变形过程除晶粒转动和滑动机制外,位错滑移和孪生也作为辅助超塑变形机制。; Influence of deformation temperature and strain rate on superplastic formation(SPF) of Ti-6Al-4V alloy processed by hydrogenation was studied by using Gleeble-1500D thermal simulator.Mechanism of improving superplasticity of titanium alloy by thermo-hydrogen treatment was analyzed with X-ray diffraction(XRD),scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The results showed that thermo-hydrogen treatment could not only decrease the superplastic flow stress and deformation temperature,but also increase strain rate and the value of strain rate sensitivity index represented by 'm'.There was optimal hydrogen content for improving the superplasticity of titanium alloy.Though the deformation temperature decreased to 800 C and the deformation rate was 3�-3 s-1,TC4 titanium alloy with 0.35%(mass fraction) hydrogen had superplastic ability to a certain extent and the mechanism of superplastic formation(SPF) was the combined effect of crystal grain rotating,grain boundary sliding supplied with dislocation gliding and twinning deformation. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/61219]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 郭隆,白秉哲,侯红亮,等. 置氢Ti-6Al-4V钛合金超塑性研究[J],2010, 2010. |
| APA | 郭隆,白秉哲,侯红亮,Guo Long,Bai Bingzhe,&Hou Hongliang.(2010).置氢Ti-6Al-4V钛合金超塑性研究.. |
| MLA | 郭隆,et al."置氢Ti-6Al-4V钛合金超塑性研究".(2010). |
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