Tensile property enhancement by oxygen solutes in selectively laser melted titanium materials fabricated from pre-mixed pure Ti and TiO2 powder

被引：45

作者：

Kondoh, Katsuyoshi ^{[1
]}

Ichikawa, Eri ^{[2
]}

Issariyapat, Ammarueda ^{[2
]}

Shitara, Kazuki ^{[1
]}

Umeda, Junko ^{[1
]}

Chen, Biao ^{[3
]}

Li, Shufeng ^{[4
]}

机构：

[1] Osaka Univ, Joining & Welding Res Inst, 11-1 Mihogaoka, Osaka 5670047, Japan

[2] Osaka Univ, Grad Sch Engn, 1 Yamadaoka, Suita, Osaka 5650871, Japan

[3] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[4] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 795卷

基金：

日本科学技术振兴机构;

关键词：

Additive manufacturing; Titanium; Rapid solidification; X-ray diffraction; Interstitial lattice defect; SOLID-SOLUTION; MECHANICAL-PROPERTIES; STAINLESS-STEEL; STRENGTH; DUCTILITY; MANUFACTURE; BEHAVIOR; ALLOY;

D O I：

10.1016/j.msea.2020.139983

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ti-based materials with high oxygen solute contents were fabricated from mixtures of Ti powder and TiO2 particles by selective laser melting (SLM). Uniformly dissolved oxygen (O) from the TiO2 particles caused c lattice expansion in alpha-Ti crystals, which effectively increased the strengths of as-built SLM Ti-O materials. The as-built SLM Ti-O material using 1.5 wt% TiO2 showed a yield stress of 962 MPa and 15.3% elongation. The yield stress increases calculated by the Hall-Petch equation and Labusch model were equivalent to those observed experimentally, and O solid-solution strengthening was dominant in increasing yield stress.

引用

页数：5

共 33 条

[1] Novel TiB2-reinforced 316L stainless steel nanocomposites with excellent room- and high-temperature yield strength developed by additive manufacturing [J].