Design, strength prediction of Ti35NbxSnyZrzMo alloys with low elastic moduli and experimental verification on their mechanical properties

• Published in: Rare metals Vol. 33; no. 6; pp. 657 - 662
• Main Authors: Wang, Yu, Dai, Shi-Juan, Chen, Feng, Yu, Xin-Quan, Zhang, You-Fa
• Format: Journal Article
• Language: English
• Published: Springer Berlin Heidelberg Nonferrous Metals Society of China 01.12.2014; Springer Nature B.V
• Subjects: Alloys; Biomaterials; Chemistry and Materials Science; Energy; Materials Engineering; Materials Science; Metallic Materials; Modulus of elasticity; Molybdenum base alloys; Nanoscale Science and Technology; Physical Chemistry; Solid solutions; Strength; Texts; Titanium base alloys; Zirconium; 力学性能; 实验; 弹性模量; 强度公式; 强度预测; 设计方法; 钛合金; 验证; Ti–Nb alloys; Elastic modulus; d-Electron alloy design
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-013-0145-7

Based on the d-electron alloy design method and the average valence electron concentration theory,three kinds of metastable b-type Ti–35Nb-based alloys containing different quantities of Sn, Zr, and Mo alloying elements were designed, whose —Md = 2.45 e V and e/a = 4.24, and —Bo values = 2.869, 2.866, and 2.860,respectively. Meanwhile, a formula for predicting the solid solution strength of Ti–Nb-based alloys was developed using JMat Pro software. The experiments show that the designed alloys are all composed of single b phase after solid solution treatment, the tensile strength of the alloys coincides well with that predicted by the formula（the relative error ／4 %）, and the elastic moduli decrease with —Bo values increasing. The Ti35Nb3.7Zr1.3Mo alloy has the biggest —Bo value（2.869） and the lowest elastic modulus（54 GPa） among the three designed alloys.