Microstructure and properties of novel AlSi11CuMn alloy manufactured by selective laser melting

被引：42

作者：

Pozdniakov, A. V. ^{[1
]}

Churyumov, A. Yu. ^{[1
]}

Loginova, I. S. ^{[1
]}

Daubarayte, D. K. ^{[2
]}

Ryabov, D. K. ^{[3
]}

Korolev, V. A. ^{[2
]}

机构：

[1] NUST MISiS, Leninskiy Ave 4, Moscow 119991, Russia

[2] UC RUSAL, LLC Light Mat & Technol Inst, Leninsky Ave 6B21, Moscow, Russia

[3] UC RUSAL, Vasilisi Kozhonoi 1, Moscow, Russia

来源：

MATERIALS LETTERS | 2018年 / 225卷

关键词：

SLM; Al-Si alloys; Microstructure; Hardness; Strength; Heat treatment; MECHANICAL-PROPERTIES; AL-12SI ALLOY; HEAT-TREATMENT; POWDER; BEHAVIOR; HPDL; SLM;

D O I：

10.1016/j.matlet.2018.04.077

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure and mechanical properties of the novel AlSi11CuMn alloy manufactured by selective laser melting were investigated in the as processed state and after heat treatment. A fine eutectic structure formed in the as processed alloy. A duplex size structure formed after solution treatment. The thermal expansion coefficient was 19.1.10 (6) degrees C-1 in the 20-100 degrees C range which is typical for cast Al-Si alloys. Increasing annealing temperature from 190 to 275 degrees C leads to a sharp decrease in the alloy hardness from 136HV to 119HV after 2.5 h. The hardness was significantly reduced from 136HV to 79-82HV after solution treatment at 515 degrees C. The yield stress, ultimate tensile strength and elongation were 288 MPa, 354 MPa and 5.4%, respectively after solution treatment at 515 degrees C and aging at 180 degrees C for 8 h. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：33 / 36

页数：4

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