Microstructural and Mechanical Evolution of a Low Carbon Steel by Friction Stir Processing

IMR OpenIR

	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
发表期刊	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN	1073-5623
卷号	48A 期号:8 页码:3869-3879
摘要	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.; 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.
部门归属	[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
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	World Academy of Sciences (TWAS) under the Visiting Researchers Program of TWAS-UNESCO Associateship Scheme [3240260896]
收录类别	SCI
语种	英语
WOS记录号	WOS:000404516100023
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78031
专题	中国科学院金属研究所
通讯作者	Purcek, G (reprint author), Karadeniz Tech Univ, Dept Mech Engn, TR-61080 Trabzon, Turkey.; Purcek, G (reprint author), Giresun Univ, Fac Engn, Giresun, Turkey.
推荐引用方式 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.