Ni_(75)Al_(14)Mo_(11)合金早期沉淀相场微观模拟  

Microscopic Phase-field Simulation for Formation of Pre-precipitation for Ni_(75)Al_(14)Mo_(11)

作　　者：王锟[1] 赵宇宏[1] 杨东然 侯华[1] 王欣然[1] 田园[1] 

机构地区：[1]中北大学,山西太原030051

出　　处：《稀有金属材料与工程》2015年第4期939-944,共6页Rare Metal Materials and Engineering

基　　金：科技部国际科技合作项目(2011DFA50520);国家自然科学基金(51204147;51274175);山西省回国留学人员科研资助项目(2011-重点6;2013-81);山西省国际科技合作项目(2013081017;2012081013)

摘　　要：利用三元微观相场动力学模型耦合弹性微观理论,模拟了973 K下,弹性应变能对Ni75Al14Mo11合金早期沉淀过程的影响。对该合金微观组织演化图、L10相体积分数、序参数及占位几率进行了分析。结果表明,该合金首先析出L10结构相(L10(Ⅰ)/L10(Ⅱ))。随着弹性应变能增加,2种L10结构相的析出受到影响,弹性应变能明显抑制L10(Ⅰ)的析出。随着时效的进行,2种L10结构相最终转变为大量的L12结构沉淀相。Based on the microscopic phase-field dynamic model and the micro-elasticity theory, the pre-precipitation process of Ni75A114Mo11 alloy was simulated at 973 K. The investigation of the microscopic morphology evolution figures, the change of L10 volume fraction, order parameter and occupation probability indicate that the first precipitation is L10 structure which has two variants of Llo（I） structure and Llo（II） structure. With the increase of the elastic strain energy, the precipitation of two L10 structures are affected, and the elastic strain energy, obviously, inhibits the formation of the L10（I） structure. At last, the two Llo structures transform to precipitation of L 12 order structure

关 键 词：Ni75Al14Mo11合金 早期沉淀 弹性应变能 L10结构 

分 类 号：TG132.3[一般工业技术—材料科学与工程]