期刊
MATERIALIA
卷 6, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtla.2019.100299
关键词
Selective laser melting; Beta titanium; Trip effect; Microstructure; Plasticity
资金
- Australian Research Council Discovery Project [DP110101653]
- Innovation Team in Key Areas of Shaanxi Province [2016KCT-30]
This work reports simultaneous achievement of high strength and large tensile ductility in a beta titanium alloy manufactured by selective laser melting (SLM). The SLM-produced samples present a unique microstructure and great mechanical behavior due to fast cooling in SLM process. Simultaneous improvement in yield strength (similar to 592 +/- 21 MPa), ultimate tensile strength (716 +/- 14 MPa) and ductility (37 +/- 5%) of SLM-produced sample results from the combination of fine columnar grains and sub-grains, strong texture and the transformation-induced plasticity (TRIP) and hard-wraps-soft effects. The large amount of sub-grain boundaries and strong texture delay the initiation of martensitic transformation in the SLM-produced sample, thereby increasing its yield strength.
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