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Microstructural and Mechanical Evolution of a Low Carbon Steel by Friction Stir Processing
Sekban, Dursun Murat; Aktarer, Semih Mahmut; Zhang, Hao; Xue, Peng; Ma, Zongyi; Purcek, Gencaga; Purcek, G (reprint author), Karadeniz Tech Univ, Dept Mech Engn, TR-61080 Trabzon, Turkey.; Purcek, G (reprint author), Giresun Univ, Fac Engn, Giresun, Turkey.
2017-08-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume48AIssue:8Pages:3869-3879
AbstractA low carbon steel (Grade A) was subjected to friction stir processing (FSP), and the effect of FSP on the microstructure and mechanical properties was investigated systematically. It was found that two distinct zones called stir zone (SZ) and heat-effected zone (HAZ) were formed during FSP. The SZ and HAZ consist mainly of ferrite, widmanstatten ferrite, ferrite+cementite aggregates, and martensite. FSP considerably refined the microstructure of the steel by means of dynamic recrystallization mechanism and formed a volumetric defect-free basin-like processed region. The ferritic grain size of the steel decreased from 25 A mu m in the coarse-grained state to about 3 A mu m in the fine-grained state, and the grains formed were separated mostly by high angle of misorientation with low density of dislocations. This microstructural evolution brought about a considerable increase in both hardness and strength values without a considerable decrease in ductility. Ultrafine-grained microstructure formed around and just beneath the pin increased the hardness of the steel from 140 Hv0.3 to about 245 Hv0.3. However, no hardness uniformity was formed throughout the processed zone due to the changes in deformation- and temperature-induced microstructure. Both yield and tensile strength values of processed zone increased from 256 and 435 MPa to about 334 and 525 MPa, respectively.; A low carbon steel (Grade A) was subjected to friction stir processing (FSP), and the effect of FSP on the microstructure and mechanical properties was investigated systematically. It was found that two distinct zones called stir zone (SZ) and heat-effected zone (HAZ) were formed during FSP. The SZ and HAZ consist mainly of ferrite, widmanstatten ferrite, ferrite+cementite aggregates, and martensite. FSP considerably refined the microstructure of the steel by means of dynamic recrystallization mechanism and formed a volumetric defect-free basin-like processed region. The ferritic grain size of the steel decreased from 25 A mu m in the coarse-grained state to about 3 A mu m in the fine-grained state, and the grains formed were separated mostly by high angle of misorientation with low density of dislocations. This microstructural evolution brought about a considerable increase in both hardness and strength values without a considerable decrease in ductility. Ultrafine-grained microstructure formed around and just beneath the pin increased the hardness of the steel from 140 Hv0.3 to about 245 Hv0.3. However, no hardness uniformity was formed throughout the processed zone due to the changes in deformation- and temperature-induced microstructure. Both yield and tensile strength values of processed zone increased from 256 and 435 MPa to about 334 and 525 MPa, respectively.
description.department[sekban, dursun murat] karadeniz tech univ, dept naval architecture & marine engn, tr-61080 trabzon, turkey ; [aktarer, semih mahmut] recep tayyip erdogan univ, dept automot technol, tr-53020 rize, turkey ; [zhang, hao ; xue, peng ; ma, zongyi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110000, peoples r china ; [purcek, gencaga] karadeniz tech univ, dept mech engn, tr-61080 trabzon, turkey ; [purcek, gencaga] giresun univ, fac engn, giresun, turkey
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationWorld Academy of Sciences (TWAS) under the Visiting Researchers Program of TWAS-UNESCO Associateship Scheme [3240260896]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78031
Collection中国科学院金属研究所
Corresponding AuthorPurcek, G (reprint author), Karadeniz Tech Univ, Dept Mech Engn, TR-61080 Trabzon, Turkey.; Purcek, G (reprint author), Giresun Univ, Fac Engn, Giresun, Turkey.
Recommended Citation
GB/T 7714
Sekban, Dursun Murat,Aktarer, Semih Mahmut,Zhang, Hao,et al. Microstructural and Mechanical Evolution of a Low Carbon Steel by Friction Stir Processing[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2017,48A(8):3869-3879.
APA Sekban, Dursun Murat.,Aktarer, Semih Mahmut.,Zhang, Hao.,Xue, Peng.,Ma, Zongyi.,...&Purcek, G .(2017).Microstructural and Mechanical Evolution of a Low Carbon Steel by Friction Stir Processing.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,48A(8),3869-3879.
MLA Sekban, Dursun Murat,et al."Microstructural and Mechanical Evolution of a Low Carbon Steel by Friction Stir Processing".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 48A.8(2017):3869-3879.
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