A high-strength heat-resistant Al-5.7Ni eutectic alloy with spherical Al3Ni nano-particles by selective laser melting

被引：92

作者：

Deng, Junwang ^{[1
]}

Chen, Chao ^{[1
]}

Liu, Xiaochun ^{[2
]}

Li, Yunping ^{[1
]}

Zhou, Kechao ^{[1
]}

Guo, Shengmin ^{[3
]}

机构：

[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Inst Met, Changsha 410004, Peoples R China

[3] Louisiana State Univ, Dept Mech & Ind Engn, Baton Rouge, LA 70803 USA

来源：

SCRIPTA MATERIALIA | 2021年 / 203卷

基金：

国家重点研发计划;

关键词：

Al-Ni alloy; Eutectic alloy; Additive manufacturing; selective laser melting; MECHANICAL-PROPERTIES; AL-12SI ALLOY; AL; MICROSTRUCTURE; TEMPERATURE;

D O I：

10.1016/j.scriptamat.2021.114034

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Traditional high-strength wrought aluminum alloys are sensitive to cracks in additive manufacturing (AM) while the eutectic aluminum alloys can be reliably printed. To explore a high-strength heat-resistant aluminum alloys by AM, in this paper, we proposed to retard the solidification range by using an Al-5.7Ni alloy, thus alleviate crack formation tendency. The AM parts of this alloy was featured by uniformly distributed spherical Al3Ni nano-particles with an average size of similar to 33 nm, showing a novel coherent crystallographic relationship with the matrix, <110>(Al)parallel to<113>(Al3Ni) and {111}(Al)parallel to{211}(Al3Ni). Excellent mechanical property was achieved in this crack-free alloy with tensile strength of 410 MPa at room temperature and 140 MPa at 300 degrees C, mainly attributed to the dispersion strengthening from the Al3Ni nano-particles with superior thermal stability. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：4