Microstructure of Al-Mg-Sc-Zr alloy cold spray deposits after heat treatment and hot isostatic pressing

被引：18

作者：

Khomutov, M. ^{[1
]}

Chereshneva, A. ^{[1
]}

Petrovskiy, P. ^{[1
]}

Daubarayte, D. ^{[2
]}

Cheverikin, V ^{[1
]}

Sova, A. ^{[3
]}

Travyanov, A. ^{[1
]}

Smurov, I ^{[1
,3
]}

机构：

[1] Natl Univ Sci & Technol MISiS, 4 Leninsky Prospect, Moscow 119991, Russia

[2] UC RUSAL LLC LMTI, UC Rusal, Light Mat & Technol Inst, Moscow, Russia

[3] Univ Lyon, Natl Engn Sch St Etienne ENISE, LTDS Lab, UMR 5513, F-42100 St Etienne, France

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 858卷 / 858期

关键词：

Cold spray; Aluminum alloy; Scandium; Hot isostatic pressing; Heat treatment;

D O I：

10.1016/j.jallcom.2020.157644

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cold spraying is a coating deposition and additive manufacturing method capable of producing aluminum alloy parts at a high production rate under ambient conditions. In this work, the cold spray was applied for the deposition of AlMgScZr alloy initially developed for laser bed powder fusion additive manufacturing. The low-porosity deposits were successfully produced. Different heat-treatments as well as capsule-free hot isostatic pressing (HIP) were performed to homogenize the structure. TEM analysis of the deposits showed that heat-treatment at 300 degrees C (3 h) + 360 degrees C (4 h) allowed to release the Al-3(Sc-x,Zr1-x) hardening phase with mean grain size 7.6 nm. At the same time, the heat treatment had a limited influence on the material diffusion between the splats. Hot isostatic pressing conducted at 160 MPa and 300 degrees C (3 h) + 360 degrees C (4 h) was more efficient for enhancing of material diffusion between splats and also allowed to the material hardening by the release of Al-3(Sc-x,Zr1-x) hardening phase with the mean grain size 3.1 nm. The compressive strength tests revealed significant improvement of ultimate compressive strength and the strain at failure of the deposits after heat treatment and HIP. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：12

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