Elinvar合金的沉淀硬化  

PRECIPITATION HARDENING OF ELINVAR ALLOY

作　　者：刘治国[1] 陈涌[2] 曹燕妮[2] 朱正生 

机构地区：[1]南京大学物理系,教授南京210008 [2]南京大学 [3]陕西钢铁研究所

出　　处：《金属学报》1990年第4期A270-A274,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金

摘　　要：本文研究了掺Ti,Al的Elinvar合金在700℃时效过程中γ′相沉淀过程及材料显微硬度的变化。原子探针场离子显微镜的观察表明:γ′相沉淀均呈球形和基体共格,其化学成分为(Ni_(0.53),Fe_(0.47))_3(Ti_(0.6),Al_(0.4)),两相界面清晰,γ′相的粗化过程服从Lifshitz和Wagner理论。材料的硬度在沉淀物平均直径为11um时达到最大,这一现象可以从沉淀硬化的理论得到定性的解释。The microstructural evolution and precipitation hardening of an Elin-var alloy doped with Ti and Al during isothermal aging at 700℃ have been inves-tigated by atom probe field ion microscopy and microhardness measurement. Theγ′ precipitates formed are spherical and coherent with the matrix. The chemical com-position of the precipitates are (Ni_(0.53)Fe_(0.47))_3(Ti_(0.6)Al_(0.4)). During aging, a Lifshitz-Wanger type dissolution and coarsening reaction of the precipitates has been obse-rved. The hardness of the material varies with the aging time and reaches maxi-mum when the average diameter of the precipitates was about 11 nm.

关 键 词：Elinvar合金 沉淀 硬化 相 合金 

分 类 号：TG135.2[一般工业技术—材料科学与工程]