The Effect of IMCs and Segregation on the Microstructure and Mechanical Properties of β-Type Titanium Alloys

被引:0
|
作者
Ma, Xi-Long [1 ]
Jia, Bo-Wen [1 ]
Nie, Guo-Quan [2 ]
Shang, Zhi-Feng [1 ]
Fu, Bin-Bin [1 ]
Ren, He [1 ]
机构
[1] Shijiazhuang Tiedao Univ, Sch Mat Sci & Engn, Shijiazhuang 050043, Peoples R China
[2] Shijiazhuang Tiedao Univ, Sch Mech Engn, Shijiazhuang 050043, Peoples R China
关键词
beta-type titanium alloys; segregation behaviors; microstructure and mechanical properties; cold crucible levitation melting; TI; CAST;
D O I
10.3390/met13101676
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Two new beta-type titanium (beta-Ti) alloys of Ti-10.5Cr-5.4Mn-2.4Zr-0.9Al and Ti-15.6Cr-12Mn-3.3Zr were designed with the same bond order value 2.79 and different d-orbital energy level values of 2.28 and 2.16, respectively. The effect of intermetallic compounds (IMCs) and the segregation behaviors of beta-Ti alloys were discussed by adding excessive and normal alloying elements to alloys under both as-cast and solution-treated conditions. The mono-beta phase in the Ti-10.5Cr-5.4Mn-2.4Zr-0.9Al alloy and beta+intermetallic compounds (IMCs) in the Ti-15.6Cr-12Mn-3.3Zr alloy were identified and observed. The as-cast and solution-treated alloys showed their ultimate tensile strength and fracture strain; these were 982 and 1002 MPa, with 9.82 and 9.89% for Ti-10.5Cr-5.4Mn-2.4Zr-0.9Al, and 448 and 296 MPa, with 0.12 and 0.11% for Ti-15.6Cr-12Mn-3.3Zr, respectively. Moreover, the Vickers hardness values of the as-cast and solution-treated alloys were 345 and 355 for Ti-10.5Cr-5.4Mn-2.4Zr-0.9Al, and 422 and 466 for Ti-15.6Cr-12Mn-3.3Zr, respectively.
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页数:9
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