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Microstructural characteristics and hardness enhancement of super duplex stainless steel by friction stir processing
Linlin Pan1,2; Chi Tat Kwok3; Kin Ho Lo3
2022-08
Source PublicationMaterials
ISSN1996-1944
Volume15Pages:1862566
Abstract

In the present study, microstructural evolution and hardness of the friction stir processed (FSPed) SAF 2507 super duplex stainless steel fabricated at a rotational speed of 650 rpm and a traverse speed of 60 mm/min were investigated. A scanning electron microscope (SEM) equipped with an electron backscatter diffraction (EBSD) detector was used to study the microstructure of the stir zone. The grain sizes of austenite and ferrite in the FSPed 2507 were found to be smaller (0.75 and 0.96 μm) than those of the substrate (6.6 and 5.6 μm) attributed to the occurrence of continuous dynamic recrystallization (CDRX) in both phases. Higher degree of grain refinement and DRX were obtained at the advancing side of the FSPed specimens due to higher strain and temperature. A non-uniform hardness distribution was observed along the longitudinal direction of the SZ. The maximum hardness was obtained at the bottom (407 HV1).

KeywordFriction Stir Processing Super Duplex Stainless Steel Microstructural Evolution Hardness
DOIhttps://doi.org/10.3390/xxxxx
URLView the original
Indexed BySCIE
Language英語English
PublisherMDPI
Fulltext Access
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Document TypeJournal article
CollectionFaculty of Science and Technology
DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorLinlin Pan
Affiliation1.Institute of Applied Physics and Materials Engineering, University of Macau
2.Guangdong Provincial Key Laboratory of Advanced Welding Technology, China-Ukraine Institute of Welding, Guangdong Academy of Sciences
3.Department of Electromechanical Engineering, University of Macau
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Linlin Pan,Chi Tat Kwok,Kin Ho Lo. Microstructural characteristics and hardness enhancement of super duplex stainless steel by friction stir processing[J]. Materials,2022,15:1862566.
APA Linlin Pan,Chi Tat Kwok,&Kin Ho Lo.(2022).Microstructural characteristics and hardness enhancement of super duplex stainless steel by friction stir processing.Materials,15,1862566.
MLA Linlin Pan,et al."Microstructural characteristics and hardness enhancement of super duplex stainless steel by friction stir processing".Materials 15(2022):1862566.
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