title: Microstructure and mechanical properties of a newly developed low Young's modulus Ti-15Zr-5Cr-2Al biomedical alloy.
abstract: The Ti-15Zr-5Cr-2Al alloy has been developed and various heat treatments have been investigated to develop new biomedical materials. It is found that the heat treatment conditions strongly affect the phase constitutions and mechanical properties. The as-cast specimen is comprised of β phase and a small fraction of α phase, which is attributed to the suppression of ω phase caused by adding Al. A high yield strength of 1148±36MPa and moderate Young's modulus of 96±3GPa are obtained in the as-cast specimen. Besides the β phase and α phase, ω phase is also detected in the air cooled and liquid nitrogen quenched specimens, which increases the Young's modulus and lowers the ductility. In contrast, only β phase is detected after ice water quenching. The ice water quenched specimen exhibits a good combination of mechanical properties with a high microhardness of 302±10HV, a large plastic strain of 23±2%, a low Young's modulus of 58±4GPa, a moderate yield strength of 625±32MPa and a high compressive strength of 1880±59MPa. Moreover, the elastic energies of the ice water quenched specimen (3.22MJ/m3) and as-cast specimen (6.86MJ/m3) are higher than that of c.p. Ti (1.25MJ/m3). These results demonstrate that as-cast and ice water quenched Ti-15Zr-5Cr-2Al alloys with a superior combination of mechanical properties are potential materials for biomedical applications.
authors.affiliation: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, PR China; Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore. Electronic address: wangp@SIMTech.a-star.edu.sg.
authors.forename: Pan
authors.initials: P
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, PR China.
authors.forename: Lihong
authors.initials: L
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Solidification Processing, School of Materials, Northwestern Polytechnical University, 127# YouYi West Road, Xi'an 710072, PR China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore.
authors.forename: Jiaming
authors.initials: J
authors.lastname: Bai
authors.affiliation: Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore.
authors.forename: Baicheng
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore. Electronic address: so0001ie@e.ntu.edu.sg.
authors.forename: Jie
authors.initials: J
authors.lastname: Song
authors.affiliation: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, PR China.
authors.forename: Shaokang
authors.initials: S
authors.lastname: Guan
mesh_terms: D000497:Alloys / Q000737:chemistry*; D000535:Aluminum / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry; D055119:Elastic Modulus; D004548:Elasticity; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction; D015040:Zirconium / Q000737:chemistry
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; D002857:Chromium; D015040:Zirconium; D000535:Aluminum; D014025:Titanium
keywords: Biomedical applications; Mechanical properties; Microstructure; Titanium alloy; Young's modulus