Effect of Nb glue atom in the cluster formula on the microstructure and mechanical properties of Ti-Mo alloy

  • L Raganya Council for Scientific and Industrial Research
  • N Moshokoa Council for Scientific and Industrial Research
  • B Obadele University of Johannesburg
  • E Makhatha University of Johannesburg
  • R Machaka Council for Scientific and Industrial Research
Keywords: Alloy design, β stability, segregation, metastable β-type Ti alloys

Abstract

The effect of Nb in the glue site of the cluster-plus-glue atom model formula on the microstructure and mechanical properties of Ti-Mo alloy was investigated. Phase and microstructural analysis were performed by X-ray diffraction and electron backscatter diffraction. Tensile properties were also examined. A small amount of secondary martensitic α” and ωath nano particles were precipitated in the β matrix of both alloys, due to to the inhomogeneous distribution of Mo and/ or Nb caused by segregation, which formed local regions with high- and low-stability of the β phase. The elastic modulus was significantly reduced to 56.9 ± 3.08 GPa, while the elastic admissible strain was substantially improved. The increased β stability and suppression of the ωath phase led to no significant change in both the yield and ultimate tensile strengths, and the brittle fracture behavior. The alloy can be a potential alternative of the conventional orthopedic implant materials in orthopedic applications.

Author Biographies

L Raganya, Council for Scientific and Industrial Research

Advanced Materials Engineering, Manufacturing Cluster, Council for Scientific and Industrial Research, Meiring Naudé Road, Brummeria, Pretoria 0184, and Department of Metallurgy, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa

N Moshokoa, Council for Scientific and Industrial Research

Advanced Materials Engineering, Manufacturing Cluster, Council for Scientific and Industrial Research, Meiring Naudé Road, Brummeria, Pretoria 0184, and Department of Metallurgy, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa

B Obadele, University of Johannesburg

Department of Metallurgy, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa and Department of Chemical, Materials and Metallurgical Engineering, Botswana International University of Science and Technology, 10071 Boseja, Palapye, Botswana

E Makhatha, University of Johannesburg

Department of Metallurgy, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa

R Machaka, Council for Scientific and Industrial Research

Advanced Materials Engineering, Manufacturing Cluster, Council for Scientific and Industrial Research, Meiring Naudé Road, Brummeria, Pretoria 0184, and Department of Metallurgy, University of Johannesburg, Doornfontein Campus, Johannesburg, South Africa

Published
2022-01-25
How to Cite
Raganya, L., Moshokoa, N., Obadele, B., Makhatha, E., & Machaka, R. (2022). Effect of Nb glue atom in the cluster formula on the microstructure and mechanical properties of Ti-Mo alloy. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, 40(1), 239-243. Retrieved from http://satnt.co.za/index.php/satnt/article/view/910
Section
Conference of the South African Advanced Materials Initiative