Stable high-nickel austenitic steel produced by electron beam additive manufacturing using dual wire-feed system

被引：8
|
作者：
Moskvina, V. A. [1 ]
Melnikov, E. V. [1 ]
Astafurov, S. V. [1 ]
Panchenko, M. Yu. [1 ]
Reunova, K. A. [1 ]
Kolubaev, E. A. [1 ]
Astafurova, E. G. [1 ]
机构：
[1] RAS, Inst Strength Phys & Mat Sci SB, 2-4 Akad Skii Ave, Tomsk 634055, Russia
来源：
MATERIALS LETTERS | 2021年 / 305卷
关键词：
Stainless steel; NiCr alloy; Additive manufacturing; Austenite; Microstructure; STAINLESS-STEELS;
D O I：
10.1016/j.matlet.2021.130863
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phase composition, microstructure, tensile properties and fracture mechanism of the high-nickel austenitic steel produced by a dual wire-feed electron beam additive manufacturing were studied. The joint using of NiCr-alloy and 321-type stainless steel wires in additive manufacturing process assists the formation a fully austenitic structure in as-built billet. Its microstructure is stable against deformation-induced gamma -* alpha' martensitic transformation due to the 5-7 wt.% increase of nickel concentration relative to the initial steel wire composition. The high-nickel steel possesses high ductility (6 approximate to 54%) and plastic flow behavior similar to the conventional cast 321-type steel subjected to a solid-solution treatment.
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页数：4
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