ABSTRACT A Ti-6Al-4V alloy is one of important titanium alloys used for aerospace, power generation, chemical and biomedical applications. The alloy is available in two grades; commercial grade (0.16mass% (%)-0.2% oxygen) and extra-low interstitial (ELI) grade (0.10%-0.13% oxygen). In this study, effect of tempering on microstructure and hardness of the Ti-6Al-4V ELI alloy was investigated. The alloy was heat-treated at temperature of 1323K for 3.6ks for solution treatment at a bcc (β) phase region. The alloy is subsequently quenching into the water to promote a martensitic transformation, and then tempered at temperatures from 923K-1123K for various times from 0.6ks to 7.2ks. Microstructure of quenched specimen is a martensitic structure, which exhibits a needle-like structure. On the other hand, the microstructure of the tempered specimens are hcp+bcc (α+β) dual-phase. It is observed that the β phase increases as the tempering temperature increases or time prolongs. Hardness measurement shows that the hardness of the tempered specimen gradually increased as the time and the temperature increase. It is thought that the increase in hardness of the tempered specimen is due to precipitation hardening of the β phase.
J., S., ZULHANIF, Z., A., A. S., & Z., S. (2008). CHANGE IN MICROSTRUCTURE AND HARDNESS OF TI-6%AL-4%V ELI ALLOY ON TEMPERING PROCESS. The International Conference on Applied Mechanics and Mechanical Engineering, 13(13th International Conference on Applied Mechanics and Mechanical Engineering.), 159-165. doi: 10.21608/amme.2008.39688
MLA
SYARIF J.; ZULHANIF ZULHANIF; ABD. SALAM M. A.; SAJURI Z.. "CHANGE IN MICROSTRUCTURE AND HARDNESS OF TI-6%AL-4%V ELI ALLOY ON TEMPERING PROCESS". The International Conference on Applied Mechanics and Mechanical Engineering, 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., 2008, 159-165. doi: 10.21608/amme.2008.39688
HARVARD
J., S., ZULHANIF, Z., A., A. S., Z., S. (2008). 'CHANGE IN MICROSTRUCTURE AND HARDNESS OF TI-6%AL-4%V ELI ALLOY ON TEMPERING PROCESS', The International Conference on Applied Mechanics and Mechanical Engineering, 13(13th International Conference on Applied Mechanics and Mechanical Engineering.), pp. 159-165. doi: 10.21608/amme.2008.39688
VANCOUVER
J., S., ZULHANIF, Z., A., A. S., Z., S. CHANGE IN MICROSTRUCTURE AND HARDNESS OF TI-6%AL-4%V ELI ALLOY ON TEMPERING PROCESS. The International Conference on Applied Mechanics and Mechanical Engineering, 2008; 13(13th International Conference on Applied Mechanics and Mechanical Engineering.): 159-165. doi: 10.21608/amme.2008.39688
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