摘要
熔铸法（ＩＭ）制备的ＳｉＣ颗粒（１４μｍ）增强２０２４Ａｌ复合材料经轧制成材后，在４９０、５１０、５２０和５３０℃，初始应变速率在１．６７￣１０＾－４￣１．６７×１０＾－３ｓ＾－１的范围内进行了超塑拉伸试验。结果表明，在５２０℃、初始变速速率为８．３３×１０＾－４ｓ＾－１，超塑延伸率最大，为２９０％，ｍ值约为０．４９。同时，利用扫描电镜观察断口形貌，分析了变形机理。
Superplastic tension tests on the 14μm SiC particulate reinforced 2O24Al coposite fabricated by roll technique under temperature conditions from 490℃ to 530℃ and strain-rates ranging from 1.67×10-4 to 1.67×10-3s-1 were carried out. It was indicated that a maximum elongation of 290% and a maximum m of 0.49 were recorded at a strain rate of 8.33×10-4s-1 at 520℃. The fracture surfaces of the composite were investigated at 490℃, 510℃, and 520℃ in a constant strain rate in order to analyse deformation mechanism.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
1998年第4期443-445,共3页
Chinese Journal of Materials Research
基金
国家自然科学基金!59571006
