Microstructure and dry sliding wear behavior of laser clad AlCrNiSiTi multi-principal element alloy coatings

被引：28

作者：

Huang, Can ^{[1
,2
]}

Tang, Yi-Zhou ^{[1
,2
]}

Zhang, Yong-Zhong ^{[3
]}

Dong, An-Ping ^{[4
]}

Tu, Jian ^{[1
,2
]}

Chai, Lin-Jiang ^{[1
,2
]}

Zhou, Zhi-Ming ^{[1
,2
]}

机构：

[1] Chongqing Univ Technol, Sch Mat Sci & Engn, Chongqing 400054, Peoples R China

[2] Chongqing Municipal Key Lab Inst Higher Educ Moul, Chongqing 400054, Peoples R China

[3] Gen Res Inst Nonferrous Met, Ctr Composites, Beijing 100088, Peoples R China

[4] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Shanghai 200240, Peoples R China

来源：

RARE METALS | 2017年 / 36卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Laser cladding; Multi-principal element alloy; Microstructure; Wear behavior; MECHANICAL-PROPERTIES; ENTROPY; RESISTANCE; OXIDATION;

D O I：

10.1007/s12598-017-0912-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The approximately equimolar ratio AlCrNiSiTi multi-principal element alloy (MPEA) coatings were fabricated by laser cladding on Ti-6Al-4V (Ti64) alloy. Scanning electron microscopy (SEM), equipped with an energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) were used to characterize the microstructure and composition. Investigations show that the coatings consist of (Ti, Cr)(5)Si-3 and NiAl phases, formed by in situ reaction. The phase composition is initially explicated according to obtainable binary and ternary phase diagrams, and the formation Gibbs energy of Ti5Si3, V5Si3 and Cr5Si3. Dry sliding reciprocating friction and wear tests of the AlCrNiSiTi coating and Ti64 alloy substrate without coating were evaluated. A surface mapping profiler was used to evaluate the wear volume. The worn surface was characterized by SEM-EDS. The hardness and wear resistance of the AlCrNiSiTi coating are well compared with that of the basal material (Ti64). The main wear mechanism of the AlCrNiSiTi coating is slightly adhesive transfer from GCr15 counterpart, and a mixed layer composed of transferred materials and oxide is formed.

引用

页码：562 / 568

页数：7

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