Heterostructured alloys with enhanced strength-ductility synergy through laser-cladding

被引：47

作者：

Kim, Rae Eon ^{[1
]}

Kim, Eun Seong ^{[2
]}

Karthik, Gangaraju Manogna ^{[2
]}

Gu, Gang Hee ^{[2
]}

Ahn, Soung Yeoul ^{[2
]}

Park, Hyojin ^{[2
]}

Moon, Jongun ^{[3
]}

Kim, Hyoung Seop ^{[1
,2
,4
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous & Energy Mat Technol, Pohang 37673, South Korea

[2] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 37673, South Korea

[3] Pohang Univ Sci & Technol POSTECH, Ctr High Entropy Alloys, Pohang 37673, South Korea

[4] Yonsei Univ, Inst Convergence Res & Educ Adv Technol, Seoul 03722, South Korea

来源：

SCRIPTA MATERIALIA | 2022年 / 215卷

基金：

新加坡国家研究基金会;

关键词：

Laser-cladding; Stainless steels; Heterostructures; Laser deposition; Twinning; AUSTENITIC STAINLESS-STEEL; MECHANICAL-PROPERTIES; RESIDUAL-STRESS; CORROSION-RESISTANCE; GRAIN-STRUCTURE; DEFORMATION; MICROSTRUCTURE; STRAIN; BEHAVIOR; PLASTICITY;

D O I：

10.1016/j.scriptamat.2022.114732

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Heterostructuring has recently become a popular option to provide an excellent combination of strength and ductility in alloys. However, its production is a challenging multi-step process. In this study, we propose a simple process to develop heterostructured alloys by laser-cladding a thin layer of an identical material on the surface of the wrought material. The heterostructured laser-clad wrought samples exhibited enhanced strength and ductility compared to monolithic laser-clad and wrought 316L stainless steels. The enhanced twinning activity localized in the coating region generated high mechanical incompatibility. The hetero-deformation-induced strengthening of the heterostructured laser-clad samples resulted in an enhanced strength-ductility synergy. This approach is straightforward and viable for laser-clad available materials. This study presents a new direction for the use of laser-cladding to produce a heterostructurally-designed alloy with superior strength-ductility synergy.

引用

页数：6

共 60 条

[1] MICROSTRUCTURAL CHANGES IN LASER HARDENED ZR-2.5NB ALLOY [J].