室温应变速率及Al含量对FeAl合金拉伸性能的影响  

Effects of Room Temperature Strain Rate and Al Content on The Tensile Properties of FeAl Alloys

作　　者：郦定强[1] 林栋梁[1] 单爱党[1] 

机构地区：[1]上海交通大学

出　　处：《材料科学与工艺》1996年第2期1-5,共5页Materials Science and Technology

基　　金：国家自然科学基金

摘　　要：研究了初始应变速率在１．３９×１０４～６．９５×１０（－１）Ｓ（－１）范围内Ｆｅ－３６．５Ａｌ和Ｆｅ－４０Ａｌ的室温拉伸性能，结果发现，应变速率对ＦｅＡｌ合金室温下的断裂延伸率、屈服强度和抗拉强度均有不同程度的影响，其中对断裂延伸率的影响最为显著，应变速率对ＦｅＡｌ合金力学性能的影响程度还与Ａｌ含量有关，Ｆｅ－３６．５Ａｌ较Ｆｅ－４０Ａｌ合金受应变速率的影响更大。研究结果还表明，Ａｌ含量还影响着ＦｅＡｌ合金拉伸断口中穿晶断裂与沿晶断裂所占面积比例，而应变速率在测试范围内对同一成分合金的断口形貌无显著影响．The effect of strain rate on tensile properties of Fe-36.5at%Al and Fe-40at%Al alloys at room temperature has been studied. The results show that the strain rate affect the tensile properties of yield stess and ultimate stress on different extent and has a more significant effect on the elongation to fracture. Both the strain rate sensitivity and the fracture surfaces of FeAl alloys are related with Al content and the alloy with Al has a lower sensitivity to the strain rate.The result also appear that the fracture surfaces of the alloy with less Al have much larger transgranular fracture field than that of the alloy with more Al.

关 键 词：金属间化合物 应变速率 力学性能 

分 类 号：TG113.25[金属学及工艺—物理冶金]