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粉末冶金Ni56Fe19Al25合金的相態(tài)與超彈性行為
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中國博士后科學(xué)基金資助項目（20090461017）


Phase States and Super-Elasticity Behavior of Powder Metallurgical Ni56Fe19Al25 Alloy
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    摘要:

    用粉末冶金技術(shù)制備Ni56Fe19Al25合金，將Ni、Fe、Al的元素粉與預(yù)合金粉等量混合后在500 MPa下壓制成形，于1280 ℃溫度燒結(jié)后進行熱處理，對合金燒結(jié)態(tài)和淬火態(tài)進行X射線衍射(XRD)分析及力學(xué)性能檢測。結(jié)果表明：粉末冶金技術(shù)制備的Ni56Fe19Al25合金燒結(jié)態(tài)為(β+γ)雙相組織，淬火態(tài)處于(β′+γ)雙相區(qū)。Ni56Fe19Al25合金淬火態(tài)在應(yīng)力作用下呈現(xiàn)出良好的線性超彈性，抗拉強度達(dá)850 MPa，最高彈性變形量大于4.5%，斷裂前總變形量達(dá)到9.2%。

    Abstract:

    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%.

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盧 靜,羅豐華,陳春輝,高 翔,崔建民.粉末冶金Ni56Fe19Al25合金的相態(tài)與超彈性行為[J].稀有金屬材料與工程,2010,39(11):1989~1992.[Lu Jing, Luo Fenghua, Chen Chunhui, Gao Xiang, Cui Jianmin. Phase States and Super-Elasticity Behavior of Powder Metallurgical Ni56Fe19Al25 Alloy[J]. Rare Metal Materials and Engineering,2010,39(11):1989~1992.]
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  • 收稿日期:2009-11-21
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