The Evolution of Microstructure of Ti-6Al-4V Alloy during Water Cooling

DOI

10.2991/icmsa-15.2015.166How to use a DOI?

Keywords

Ti-6Al-4V Alloy, Solution Treating, Water Cooling Temperature, Microstructure.

Abstract

In this paper, Ti-6Al-4V alloy was water cooled from three different temperatures after solution treating. The microstructure of the specimens after thermomechanical treatment testing was observed by light optical microscopy (LOM) and scanning electron microscopy (SEM), respectively. The hardness of specimens was measured for each heat-treated condition. The evolution of microstructure of Ti-6Al-4V alloy during water cooling was investigated. The results showed that the hardness of the specimen increases with increasing water cooling temperature. Grain boundary provides nucleation sites when Ti-6Al-4 alloy was water cooled from 800 after solution anneal followed by cooling at a cooling rate of 5 /min. Higher water cooling temperature tends to promote the more homogeneous structures, whereas lower water cooling temperature result in less homogeneous alpha plates. Therefore, alpha phase refines with increasing water cooling temperature. The coarsest platelet alpha formed at water cooling temperature of 600 , this is because enough time is allowed for grain growth of alpha plates. Water cooling temperature after solution treatment affects the variety of the hardnesses and the evolution of microstructure for Ti-6Al-4V alloy. The highest hardness value (HV5=243) were obtained when the specimens were water cooled at 800 , this is attributed to finer platelet alpha and homogeneous structures.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jiu-Zhou Li
AU  - Huan-Huan Yu
AU  - Zhuang Li
AU  - Shuai Wang
AU  - Tao Yu
AU  - Zhao-Hua Li
PY  - 2014/06
DA  - 2014/06
TI  - The Evolution of Microstructure of Ti-6Al-4V Alloy during Water Cooling
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 897
EP  - 901
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.166
DO  - 10.2991/icmsa-15.2015.166
ID  - Li2014/06
ER  -