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Influence of Ultrasonic Surface Rolling on Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy.
Materials (Basel) 2017; 10(10)M

Abstract

The present article studied the effect of ultrasonic surface rolling process (USRP) on the microstructure and wear behavior of a selective laser melted Ti-6Al-4V alloy. Surface characteristics were investigated using optical microscope, nano-indentation, scanning electron microscope, transmission electron microscope and laser scanning confocal microscope. Results indicated that the thickness of pore-free surfaces increased to 100~200 μm with the increasing ultrasonic surface rolling numbers. Severe work hardening occurred in the densified layer, resulting in the formation of refined grains, dislocation walls and deformation twins. After 1000 N 6 passes, about 15.5% and 14.1% increment in surficial Nano-hardness and Vickers-hardness was obtained, respectively. The hardness decreased gradually from the top surface to the substrate. Wear tests revealed that the friction coefficient declined from 0.74 (polished surface) to 0.64 (USRP treated surface) and the wear volume reduced from 0.205 mm-3 to 0.195 mm-3. The difference in wear volume between USRP treated and polished samples increased with sliding time. The enhanced wear resistance was concluded to be associated with the improvement of hardness and shear resistance and also the inhibition of delamination initiation.

Authors+Show Affiliations

National Engineering Research Center of Near-Net Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China. 201510100611@mail.scut.edu.cn.National Engineering Research Center of Near-Net Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China. zhyxiao@scut.edu.cn. Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China. zhyxiao@scut.edu.cn.National Engineering Research Center of Near-Net Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China. 201620101553@mail.scut.edu.cn.National Engineering Research Center of Near-Net Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China. lpwen@scut.edu.cn. Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China. lpwen@scut.edu.cn.National Engineering Research Center of Near-Net Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China. mezhang@scut.edu.cn. Guangdong Key Laboratory for Advanced Metallic Materials Processing, South China University of Technology, Guangzhou 510640, China. mezhang@scut.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29048344

Citation

Wang, Zhen, et al. "Influence of Ultrasonic Surface Rolling On Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy." Materials (Basel, Switzerland), vol. 10, no. 10, 2017.
Wang Z, Xiao Z, Huang C, et al. Influence of Ultrasonic Surface Rolling on Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy. Materials (Basel). 2017;10(10).
Wang, Z., Xiao, Z., Huang, C., Wen, L., & Zhang, W. (2017). Influence of Ultrasonic Surface Rolling on Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy. Materials (Basel, Switzerland), 10(10), doi:10.3390/ma10101203.
Wang Z, et al. Influence of Ultrasonic Surface Rolling On Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy. Materials (Basel). 2017 Oct 19;10(10) PubMed PMID: 29048344.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of Ultrasonic Surface Rolling on Microstructure and Wear Behavior of Selective Laser Melted Ti-6Al-4V Alloy. AU - Wang,Zhen, AU - Xiao,Zhiyu, AU - Huang,Chuanshou, AU - Wen,Liping, AU - Zhang,Weiwen, Y1 - 2017/10/19/ PY - 2017/09/14/received PY - 2017/10/08/revised PY - 2017/10/17/accepted PY - 2017/10/20/entrez PY - 2017/10/20/pubmed PY - 2017/10/20/medline KW - Ti-6Al-4V KW - microstructure and properties KW - selective laser melting KW - ultrasonic surface rolling process KW - wear JF - Materials (Basel, Switzerland) JO - Materials (Basel) VL - 10 IS - 10 N2 - The present article studied the effect of ultrasonic surface rolling process (USRP) on the microstructure and wear behavior of a selective laser melted Ti-6Al-4V alloy. Surface characteristics were investigated using optical microscope, nano-indentation, scanning electron microscope, transmission electron microscope and laser scanning confocal microscope. Results indicated that the thickness of pore-free surfaces increased to 100~200 μm with the increasing ultrasonic surface rolling numbers. Severe work hardening occurred in the densified layer, resulting in the formation of refined grains, dislocation walls and deformation twins. After 1000 N 6 passes, about 15.5% and 14.1% increment in surficial Nano-hardness and Vickers-hardness was obtained, respectively. The hardness decreased gradually from the top surface to the substrate. Wear tests revealed that the friction coefficient declined from 0.74 (polished surface) to 0.64 (USRP treated surface) and the wear volume reduced from 0.205 mm-3 to 0.195 mm-3. The difference in wear volume between USRP treated and polished samples increased with sliding time. The enhanced wear resistance was concluded to be associated with the improvement of hardness and shear resistance and also the inhibition of delamination initiation. SN - 1996-1944 UR - https://www.unboundmedicine.com/medline/citation/29048344/Influence_of_Ultrasonic_Surface_Rolling_on_Microstructure_and_Wear_Behavior_of_Selective_Laser_Melted_Ti_6Al_4V_Alloy_ L2 - http://www.mdpi.com/resolver?pii=ma10101203 DB - PRIME DP - Unbound Medicine ER -