Enhancing strength-ductility synergy in nano-sized TiB2/Al composite via rapid solidification and thermo-mechanical processing

被引：0

作者：

Wang, Lei ^{[1
]}

Chen, Zhe ^{[1
]}

Yang, Sanqiang ^{[2
,3
]}

Wang, Haowei ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[2] Peking Univ, Dept Engn, Beijing 100871, Peoples R China

[3] Beijing Satellite Mfg Co Ltd, Beijing 100094, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2024年 / 218卷

基金：

中国国家自然科学基金;

关键词：

Al matrix composites; Nano-sized TiB 2; Microstructure evolution; TiB 2 /Al interface; Strength-ductility mechanisms; GRAIN-BOUNDARY SEGREGATION; METAL-MATRIX COMPOSITES; INGOT METALLURGY; AL; MICROSTRUCTURE; ALUMINUM; BEHAVIOR; ALLOY; NANOPARTICLES; DEFORMATION;

D O I：

10.1016/j.matchar.2024.114529

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Al-Cu-Mn (AA2219) composite reinforced by 5 wt% nano-sized TiB2 particles were fabricated by hot isostatic pressing (HIP) combined with thermal-mechanical processing to achieve a superior strength-ductility combination. Coupling the comprehensive characterizations and microstructure-based analysis, the strength-ductility mechanisms were deeply understood. Results reveal that the uniform dispersed nano-sized TiB2 particles under the current preparation process helps to improve the mechanical properties of the composite. The introduction of pre-stretch before artificial aging produced a fine 0' and S precipitates. By combining high-resolution TEM and crystal structure analysis, Al(Cu) and S phase at TiB2/Al interface were identified, and their mismatch (delta) with Al were 3.8 % and 4.8 %, respectively. Mechanisms related to pre-stretch effects on the formation of dislocation, 0' and S precipitates and corresponding structures are discussed, as well as the implications of TiB2/ Al interface characteristics on strength and ductility.

引用

页数：10