@article{cf20e4ed5fe14c1380c2bcc3a2a7fa4f,
title = "Selective laser melting of CP-Ti to overcome the low cost and high performance trade-off",
abstract = "In this study, commercially pure titanium (CP-Ti) parts were successfully fabricated by selective laser melting (SLM) using cost-effective hydride-dehydride (HDH) Ti powders for the first time modified by jet milling. Jet milling effectively improves the particle-shape sphericity, suppresses the impurity pick-up, and produces localized plastic deformation. The flowability of the jet-milled powders is tremendously improved to 29.7 s/50 g that satisfies the SLM processing well, while the oxygen content only increases by 0.02 wt.% (the raw oxygen level: 0.15 wt.%). The oxide layer in the powder surface is determined with the thickness of ∼8 nm and TiO being the predominant phase before and after jet milling. The SLM-made (SLMed) CP-Ti achieves dominant martensitic α{\textquoteright} phase with the fracture tensile strength up to 731.5 ± 5.7 MPa and elongation of 20.5 ± 1.1%, comparable with those using expensive atomized powders. Contrary to the conventional metallurgical mechanism for Ti which suffers the cost-performance dilemma, this work presents SLMed CP-Ti with excellent synergy of strength and ductility while using the cost-affordable HDH Ti powders.",
keywords = "Jet milling, Low cost, Powder modification, Selective laser melting, Titanium",
author = "Qiying Tao and Zhangwei Wang and Gang Chen and Wei Cai and Peng Cao and Cong Zhang and Wangwang Ding and Xin Lu and Ting Luo and Xuanhui Qu and Mingli Qin",
note = "Funding Information: We thank the funding from National Natural Science Foundation of China (No.: 51971036 ), Shandong Provincial Key Research and Development Program (No.: 2019JZZY010327 ), China Post Doctoral Fund (No.: 2018M640064 ), and Fundamental Research Funds for the Central Universities (No.: 06500092 ). This work is also supported by State Key Lab of Advanced Metals and Materials, University of Science and Technology Beijing (USTB) (No.: 2018-Z02 ), and State Key Laboratory for Powder Metallurgy, Central South University (CSU) (No.: 621011805 ). The authors thank Prof. Yuehui He at CSU, Prof. Hongmei Zhang at Beijing Institute of Technology and Dr. Tingting Liu at USTB for their helpful discussion and technical support. Funding Information: We thank the funding from National Natural Science Foundation of China (No.: 51971036), Shandong Provincial Key Research and Development Program (No.: 2019JZZY010327), China Post Doctoral Fund (No.: 2018M640064), and Fundamental Research Funds for the Central Universities (No.: 06500092). This work is also supported by State Key Lab of Advanced Metals and Materials, University of Science and Technology Beijing (USTB) (No.: 2018-Z02), and State Key Laboratory for Powder Metallurgy, Central South University (CSU) (No.: 621011805). The authors thank Prof. Yuehui He at CSU, Prof. Hongmei Zhang at Beijing Institute of Technology and Dr. Tingting Liu at USTB for their helpful discussion and technical support. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",
year = "2020",
month = aug,
doi = "10.1016/j.addma.2020.101198",
language = "English",
volume = "34",
journal = "Additive Manufacturing",
issn = "2214-8604",
publisher = "Elsevier BV",
}