Solid-state depositions of multilayer SS304 by friction stir metal deposition

被引：16
作者：
Gotawala, Nikhil [1 ]
Mishra, Neeraj Kumar [1 ]
Shrivastava, Amber [1 ]
机构：
[1] Indian Inst Technol, Dept Mech Engn, Mumbai 400076, Maharashtra, India
来源：
MATERIALS LETTERS | 2022年 / 314卷
关键词：
Friction stir metal deposition; Additive manufacturing; Recrystallization; Microstructure; SS304; Tensile properties; STAINLESS-STEEL; MECHANICAL-PROPERTIES; MICROSTRUCTURE; 304L;
D O I：
10.1016/j.matlet.2022.131881
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work aims to analyse the microstructure and mechanical properties of solid-state depositions of multilayer SS304 by friction stir metal deposition. The microstructure analysis suggests continuous dynamic recrystallization as the main mechanism for grain refinement in the deposited region. The grains at the interface of deposited layers are significantly refined due to severe plastic deformation. Further, the reduction of twin boundary and martensite fractions is noticed in the bulk of the layers. However, strain-induced martensitic transformation is noticed at the interface of the successively deposited regions, due to relatively high stresses owing to lower initial temperatures. The average tensile strength and fracture strain of deposited SS304 is 692 +/- 14 MPa and 87.3 +/- 16%, respectively.
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页数：4
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