布里奇曼定向凝固Ni-12%Si过共晶的弹性模量与断裂韧性

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英文篇名：Elastic Modulus and Fracture Toughness of Bridgman Directionally Solidified Ni-12%Si Hypereutectic 作者：卢百平 ; 崔春娟 ; 田露露 ; 问亚岗 ; 王佩 英文作者：LU Baiping;CUI Chunjuan;TIAN Lulu;WEN Yagang;WANG Pei;National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University;School of Metallurgical Engineering,Xi'an University of Architecture and Technology;Shaanxi Engineering Technology Research Center for Wear-resisting Materials; 关键词：定向凝固 ; 第一性原理 ; 过共晶 ; 断裂韧性 ; 三点弯曲 英文关键词：directional solidification;;first principle;;hypereutectic alloy;;fracture toughness;;three-point bending 中文刊名：CLDB 英文刊名：Materials Reports 机构：南昌航空大学轻合金加工科学与技术国防重点学科实验室;西安建筑科技大学冶金工程学院;陕西省耐磨材料工程技术研究中心; 出版日期：2019-04-25 出版单位：材料导报 年：2019 期：v.33 基金：国家自然科学基金(51201121);; 南昌航空大学轻合金加工科学与技术国防重点学科实验室开放课题(gf201601001);; 2015陕西省留学人员科技活动择优资助项目;; 陕西省耐磨材料工程技术研究中心专项资金项目(2016NMZX03)~~ 语种：中文; 页：CLDB201908026 页数：6 CN：08 ISSN：50-1078/TB 分类号：136-141

摘要

本研究采用第一性原理计算了Ni_3Si金属间化合物的弹性模量,并用Ipp6.0图像分析软件对不同凝固速率的Ni-12%Si(质量分数)过共晶定向凝固组织中α-Ni相的体积分数进行了定量分析。根据复合材料的混合法则预测了不同凝固速率的Ni-12%Si过共晶的塑性。此外,采用三点弯曲法研究了不同凝固速率的Ni-12%Si过共晶的断裂韧性,并分析了断口形貌以及断裂机理。
        In this study,the elastic modulus of the Ni_3Si intermetallic compound was calculated by the first principles,and the volume fractions of α-Ni phase in the Bridgman directionally solidified Ni-12%Si( mass fraction) hypereutectic at different solidification rates were analyzed by the Ipp6. 0 image analysis software. The plasticities of the Ni-12%Si hypereutectic at different solidification rates were predicted according to the mixing rule of composite materials. Moreover,the fracture toughnesses of the Ni-12% Si hypereutectic at different solidification rates were studied by three-point bending method,and the fracture morphology and the fracture mechanism were studied as well.

引文

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