TB8钛合金形变诱导超塑性研究
发布时间：2018-09-04 17:27
【摘要】：采用形变诱导法对TB8钛合金进行了超塑性拉伸实验,研究了变形温度、预变形量和中间保温时间对该合金超塑性性能及微观组织演变的影响。结果表明:与恒应变速率法拉伸相比,该方法拉伸后合金的超塑性得到大幅度地提升;变形温度为750℃、预变形量为50%和保温时间为20 min时,该合金的超塑性能最好,伸长率为796.1%。预变形阶段,脱溶析出和再结晶双重优化作用使亚稳态β相转变为细小均匀的再结晶组织,在后续变形过程中,细小弥散的α相既能抑制再结晶晶粒过分长大,又能在一定程度上使再结晶组织发生应变集中而破碎。超塑性变形后合金的微观组织仍然保持较好的等轴状,具有典型的超塑性变形特征。
[Abstract]:The superplastic tensile tests of TB8 titanium alloy were carried out by means of deformation-induced method. The effects of deformation temperature, pre-deformation amount and intermediate holding time on the superplasticity and microstructure evolution of the alloy were studied. The results show that the superplasticity of the alloy is greatly improved compared with the tensile method of constant strain rate method, and the superplastic energy of the alloy is the best when the deformation temperature is 750 鈩，
本文编号：2222851
[Abstract]:The superplastic tensile tests of TB8 titanium alloy were carried out by means of deformation-induced method. The effects of deformation temperature, pre-deformation amount and intermediate holding time on the superplasticity and microstructure evolution of the alloy were studied. The results show that the superplasticity of the alloy is greatly improved compared with the tensile method of constant strain rate method, and the superplastic energy of the alloy is the best when the deformation temperature is 750 鈩，
本文编号：2222851
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