Strengthening mechanisms in a new precipitation hardening stainless steel fabricated by laser powder bed fusion

被引：4
|
作者：
Chadha, Kanwal [1 ,2 ]
Tian, Yuan [3 ]
Jiang, Lu [4 ]
Dorin, Thomas [4 ]
Spray, John [1 ]
Aranas, Clodualdo, Jr. [2 ]
机构：
[1] Univ New Brunswick, Planetary & Space Sci Ctr, Fredericton, NB E3B 5A3, Canada
[2] Univ New Brunswick, Dept Mech Engn, Fredericton, NB E3B 5A3, Canada
[3] Voestalpine Addit Mfg Ctr Ltd, Mississauga, ON L5N 7Y3, Canada
[4] Deakin Univ, Inst Frontier Mat, Geelong, Vic 3220, Australia
来源：
MRS COMMUNICATIONS | 2022年 / 12卷 / 03期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
REVERTED AUSTENITE; EVOLUTION; MICROSTRUCTURE; TEXTURE;
D O I：
10.1557/s43579-022-00186-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural properties and strengthening mechanisms in precipitation strengthening Corrax stainless steel manufactured by laser powder bed fusion have been investigated. The as-printed sample initially contains a fully martensitic microstructure. However, aging heat treatment triggered the formation of austenite laths between the martensitic structure. Despite having softer reverted austenite, Corrax showed excellent hardness and strength due to the formation of Ni- and Al-rich, spherical precipitates (with an average size of 4.27 +/- 1.20 nm). The atom probe tomography analysis reveals that Cr, Mo and Si are segregated in the Fe-based martensitic matrix, while the Mn diffused to the Al- and Ni-rich precipitates.
引用
收藏
页码：365 / 369
页数：5
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