Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 799, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2020.140137
Keywords
Ti-TiBw composite powder; Selective laser melting; Nano-reticulated microstructure; Tensile properties
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Funding
- National Natural Science Foundation of China [51571160, 51871180]
- Xi'an Science and Technology Project [201805037YD15CG21(15)]
- Guangdong Introducing Innovative and Entrepreneurial Teams [2016ZT06G025]
- Guangdong Natural Science Foundation [2017B030306014]
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TiB nano-whiskers reinforced titanium matrix composites with a unique nano-reticulated micro-structure were prepared via selective laser melting, showing exceptional strength and good ductility attributed to micro structural configuration strategy.
TiB nano-whiskers reinforced titanium matrix composites (Ti-TiBw) with a unique nano-reticulated micro-structure was prepared via composite powder by selective laser melting (SLM). The composite powder was designed and produced by electrode induction melting gas atomization as starting materials for SLM other than the conventional premixed Ti-TiB2 powders. The new composite powder had a micron-scale reticulated structure with micro-nano TiBw along the grain boundaries, which was further refined to nano-scale during SLM attributing to the rapid solidification rate. The SLMed Ti-TiBw composites exhibited exceptional strength (lab = 851 MPa) while maintaining good ductility (delta = 10.2%), which was tightly related to our novel strategy of micro structural configuration.
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