A novel approach to in-situ fabricate Ti-6Al-4V alloy with graded microstructure and property by selective laser melting

作者：Yang, Jingjing; Yang, Huihui; Yu, Hanchen; Wang, Zemin^*; Wang, Hongze; Zeng, Xiaoyan

来源：Materials Letters, 2018, 215: 246-249.

DOI：10.1016/j.matlet.2017.12.098

• Selective laser melting
• Titanium alloy
• Thermal cycles
• Graded microstructure

Relationship of processing with microstructure in Ti-6Al-4V single-layer and single-track wall samples was investigated under various thermal cycles of selective laser melting (SLM). The microstructure is controlled by peak temperature (T-P) and times of thermal cycles depending on SLM processing parameters. The refinement of alpha' occurs during vertical thermal cycles of T-P > liquid temperature (T-L) and is enhanced with thermal cycle times. No obvious microstructural evolution is exhibited during thermal cycles of T-P < T-L. A novel approach to in-situ fabricate Ti-6Al-4V alloy with graded microstructure and nanohardness is successfully developed by governing the process and parameters of SLM.

• 出版日期2018-3-15
• 单位华中科技大学