The Effect of Copper Content on the Mechanical and Tribological Properties of Hypo-, Hyper- and Eutectoid Ti-Cu Alloys

Xu, Yiku; Jiang, Jianli; Yang, Zehui; Zhao, Qinyang; Chen, Yongnan; Zhao, Yongqing

doi:10.3390/ma13153411

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The Effect of Copper Content on the Mechanical and Tribological Properties of Hypo-, Hyper- and Eutectoid Ti-Cu Alloys

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School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China

Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

Authors to whom correspondence should be addressed.

Materials 2020, 13(15), 3411; https://doi.org/10.3390/ma13153411

Received: 5 July 2020 / Revised: 28 July 2020 / Accepted: 31 July 2020 / Published: 3 August 2020

(This article belongs to the Special Issue Structure and Mechanical Properties of Alloys)

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Abstract

Titanium alloys are widely used in aerospace, chemical, biomedical and other important fields due to outstanding properties. The mechanical behavior of Ti alloys depends on microstructural characteristics and type of alloying elements. The purpose of this study was to investigate the effects of different Cu contents (2.5 wt.%, 7 wt.% and 14 wt.%) on mechanical and frictional properties of titanium alloys. The properties of titanium alloy were characterized by tensile test, electron microscope, X-ray diffraction, differential scanning calorimetry, reciprocating friction and wear test. The results show that the intermediate phase that forms the eutectoid structure with α-Ti was identified as FCC Ti₂Cu, and no primary β phase was formed. With the increase of Cu content, the Ti₂Cu phase precipitation in the alloy increases. Ti₂Cu particles with needle structure increase the dislocation pinning effect on grain boundary and improve the strength and hardness of titanium alloy. Thus, Ti-14Cu shows the lowest elongation, the best friction and wear resistance, which is caused by the existence of Ti₂Cu phases. It has been proved that the mechanical and frictional properties of Ti-Cu alloys can be adjusted by changing the Cu content, so as to better meet its application in the medical field. View Full-Text

Keywords: Ti-Cu alloys; mechanical properties; tribological properties; microstructure; Ti₂Cu precipitates

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MDPI and ACS Style

Xu, Y.; Jiang, J.; Yang, Z.; Zhao, Q.; Chen, Y.; Zhao, Y. The Effect of Copper Content on the Mechanical and Tribological Properties of Hypo-, Hyper- and Eutectoid Ti-Cu Alloys. Materials 2020, 13, 3411. https://doi.org/10.3390/ma13153411

AMA Style

Xu Y, Jiang J, Yang Z, Zhao Q, Chen Y, Zhao Y. The Effect of Copper Content on the Mechanical and Tribological Properties of Hypo-, Hyper- and Eutectoid Ti-Cu Alloys. Materials. 2020; 13(15):3411. https://doi.org/10.3390/ma13153411

Chicago/Turabian Style

Xu, Yiku, Jianli Jiang, Zehui Yang, Qinyang Zhao, Yongnan Chen, and Yongqing Zhao. 2020. "The Effect of Copper Content on the Mechanical and Tribological Properties of Hypo-, Hyper- and Eutectoid Ti-Cu Alloys" Materials 13, no. 15: 3411. https://doi.org/10.3390/ma13153411

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The Effect of Copper Content on the Mechanical and Tribological Properties of Hypo-, Hyper- and Eutectoid Ti-Cu Alloys

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