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《Rare Metal Materials and Engineering》 2010-11
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Phase States and Super-Elasticity Behavior of Powder Metallurgical Ni_(56)Fe_(19)Al_(25) Alloy

Lu Jing1,Luo Fenghua1,2,Chen Chunhui1,Gao Xiang1,Cui Jianmin2 (1.State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China) (2.Laiwu Iron & Steel Group,Laiwu 271105,China)  
Ni56Fe19Al25 alloys were prepared by powder metallurgy from mixing elementary and pre-alloyed Ni,Fe and Al powder.The alloys were sintered at 1280 oC after shaping under 500 MPa,and then quenched in water.The sintered and quenched alloys were studied by X-ray diffraction (XRD) and tensile strength measurement.The results show that the as-sintered Ni56Fe19Al25 alloy is of (β+γ) dual-phase,and the as-quenched alloy is of (β′+γ) dual-phase.The as-quenched Ni-Fe-Al alloy under stress presents good linear super-elasticity;the tensile strength is 850 MPa,the total deformation amount before fracture reaches to 9.2%,and the largest elastic deformation is over 4.5%.
【Fund】: 中国博士后科学基金资助项目(20090461017)
【CateGory Index】: TF125
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