Interfacial Stability of TiC/γ-Fe in TiC/316L Stainless Steel Composites Prepared by Selective Laser Melting: First Principles and Experiment

被引：14

作者：

Bai, Peikang ^{[1
]}

Wang, Qin ^{[1
]}

Zhao, Zhanyong ^{[1
]}

Du, Wenbo ^{[2
]}

Liang, Minjie ^{[1
]}

Liao, Haihong ^{[1
]}

Li, Yuxin ^{[1
]}

Zhang, Lizheng ^{[1
]}

Han, Bing ^{[3
]}

Li, Jing ^{[1
]}

机构：

[1] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China

[2] Army Acad Armored Forces, Natl Key Lab Remfg, Beijing 100072, Peoples R China

[3] North Univ China, Coll Mechatron Engn, Taiyuan 030051, Peoples R China

来源：

METALS | 2020年 / 10卷 / 09期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

laser processing; metals and alloys; first principle; interfacial stability; heterogeneous nucleation; ADHESION STRENGTH; 1ST-PRINCIPLES; DENSITY; COATINGS; BEHAVIOR; ENERGY; SIZE; NB; MO;

D O I：

10.3390/met10091225

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TiC/316L stainless steel composites were prepared by selective laser melting. The adhesion work, interface energy and electronic structure of the TiC/gamma-Fe interfaces in TiC/316L stainless steel composites were studied to investigate the heterogeneous nucleation potential of gamma-Fe grains on TiC particles by using the first principle. The degree mismatch between TiC (001) and gamma-Fe (001) interface was lowest. There are four TiC (001)/gamma-Fe (001) interface models with different stacking sequences (on-site and bridge-site) and different atomic arrangement sequences (C centre and Ti centre). The results show that the Fe-on-Ti centre interface had the largest work of adhesion (3.87 J/m(2)) and lower interfacial energy (0.04 J/m(2)), it was more stable, and the interfacial energy of the model was lower than that of gamma-Fe/Fe melt (0.24 J/m(2)). Strong Fe-C covalent bonds and Fe-Ti metallic bonds were formed near the interface, which increased the interfacial strength, indicating that TiC had strong heterogeneous nucleation potency for gamma-Fe.

引用

页码：1 / 12

页数：12

共 29 条

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