Effects of Ultrasonic Nanocrystal Surface Modification on the Residual Stress, Microstructure, and Corrosion Resistance of 304 Stainless Steel Welds

In this study, ultrasonic nanocrystal surface modification (UNSM) of 304 stainless steel welds was carried out. UNSM effectively eliminates the tensile stress generated during welding and imparts beneficial compressive residual stresses. In addition, UNSM can effectively refine the grains and increa...

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Bibliographic Details
Published inMetallurgical and materials transactions. A, Physical metallurgy and materials science Vol. 49; no. 3; pp. 972 - 978
Main Authors Ye, Chang, Telang, Abhishek, Gill, Amrinder, Wen, Xingshuo, Mannava, Seetha R., Qian, Dong, Vasudevan, Vijay K.
Format Journal Article
LanguageEnglish
Published New York Springer US 01.03.2018
Springer Nature B.V
Subjects
Austenitic stainless steels
Characterization and Evaluation of Materials
Chemistry and Materials Science
Compressive properties
Corrosion resistance
Corrosion resistant steels
Corrosion tests
Joint strength
Materials Science
Metallic Materials
Microstructure
Nanocrystals
Nanotechnology
Residual stress
Structural Materials
Surfaces and Interfaces
Tensile stress
Thin Films
Welded joints
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Summary:In this study, ultrasonic nanocrystal surface modification (UNSM) of 304 stainless steel welds was carried out. UNSM effectively eliminates the tensile stress generated during welding and imparts beneficial compressive residual stresses. In addition, UNSM can effectively refine the grains and increase hardness in the near-surface region. Corrosion tests in boiling MgCl 2 solution demonstrate that UNSM can significantly improve the corrosion resistance due to the compressive residual stresses and changes in the near-surface microstructure.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-017-4451-9