【摘要】 对经不同制度处理的一种富β的α+β型钛合金(SPZ)的超塑性性能及组织进行了研究.结果表明,700℃/1 h AC处理后,合金具有良好的室高温性能;应变速率高达1.11×10-3/s时,合金在740℃~800℃温度范围内显示出超塑性,超塑拉伸延伸率均超过1600%;760℃,合金拉伸延伸率可高达2149%.扫描电镜(SEM)观察发现,SPZ合金的变形行为具有明显细晶超塑性的特点.应变速率为2.22×10-3/s时,740℃、780℃变形后晶粒尺寸分别为1.51mm3、.21 mm.超塑变形后合金的晶粒尺寸比变形前的有所增大;超塑性温度越高,晶粒长大程度越高.更多还原

【Abstract】 Microstructures and superplastic properties with variation of heat treatment condition of one kind of α plus β type titanium alloy were studied in this paper.The results indicated that the alloy annealed at（700℃） for 1h posseses favorite integrated properties at ambient and elevated temperature.The alloy possess superior superplastic property deformed between 740℃ and 800℃ with the orunart strain rate of 1.11×10^-3 s^-1,the elongation of the alloy is over 1600%;the maximum elongation for the alloy deformed at 760℃ is up to 2149%.The deformation behavior for the alloy has the typical fine-grained superlasticity feature.The grain size is 1.51μm and 3.21μm respectively for the alloy deformed at 740℃ and 780℃ with the strain rate of 2.22×10^-3s^-1.The grain size would increases after superplastic deformation,and should increase with the increment of superplastic temperature.更多还原