Microstructural features of novel corrosion-resistant maraging steel manufactured by laser powder bed fusion

被引：29

作者：

Palad, Robert ^{[1
]}

Tian, Yuan ^{[2
]}

Chadha, Kanwal ^{[3
]}

Rodrigues, Samuel ^{[4
]}

Aranas, Clodualdo, Jr. ^{[1
]}

机构：

[1] Univ New Brunswick, Dept Mech Engn, Fredericton, NB, Canada

[2] Voestalpine Addit Mfg Ctr Ltd, Mississauga, ON, Canada

[3] Univ New Brunswick, Planetary & Space Sci Ctr, Fredericton, NB, Canada

[4] Fed Inst Educ Sci & Technol Maranhao, Grad Program Mat Engn, Sao Luis, Maranhao, Brazil

来源：

MATERIALS LETTERS | 2020年 / 275卷 / 275期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

Additive manufacturing; Laser powder bed fusion; M789; steel; PERCENT BORON MODIFICATION;

D O I：

10.1016/j.matlet.2020.128026

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new iron-based alloy, M789 steel, has been recently introduced to the additive manufacturing (AM) industry, designed to be utilized in the laser powder bed fusion (LPBF). The effect of microstructural evolution on the hardness and tensile strength of the alloy was evaluated using optical and electron microscopy techniques. The crystallographic texture analysis suggests that elongated grains with significant low-angle grain boundaries (LAGBs) were formed, which transformed into large needle-like martensitic structures (with a lower volume fraction of LAGBs) after solutionizing and aging heat treatment. It appears that the main strengthening of the alloy is the formation of Ni3Ti precipitates. (C) 2020 Elsevier B.V. All rights reserved.

引用

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