Influence of Nb on microstructure and mechanical properties of Ti-Sn ultrafine eutectic alloy
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- 作者：Young Seok Kim ; Hae Jin Park ; Jeong Tae Kim…
- 关键词：alloys ; microstructure ; casting ; mechanical properties ; Ti ; based eutectic alloy
- 刊名：Metals and Materials International
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：23
- 期：1
- 页码：20-25
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Metallic Materials; Operating Procedures, Materials Treatment; Magnetism, Magnetic Materials; Engineering Thermodynamics, Heat and Mass Transfer; Characterization and Evaluation of Materials; Continuu
- 出版者：The Korean Institute of Metals and Materials
- ISSN：2005-4149
- 卷排序：23
文摘
In this study, A series of the high strength (T<sub>82sub>Sn<sub>18sub>)<sub>100-xsub>Nb<sub>xsub> (x=0, 1, 3, 5, and 9 at%) ultrafine eutectic alloys with large plasticity are developed by suction casting method. The Ti<sub>82sub>Sn<sub>18sub> binary eutectic alloy consists of a mixture of a hcp Ti<sub>3sub>Sn and a α-Ti phases having the plate-like lamellar type duplex structure with micro scaled eutectic colony. From the (T<sub>82sub>Sn<sub>18sub>)<sub>97sub>Nb<sub>3sub>, the alloy display structural heterogeneous distribution of ultrafine-scaled phases composed of β-Ti(Nb) solid solution surrounded by alternating plate-like shaped Ti<sub>3sub>Sn and α-Ti phases. With increasing Nb content, the volume fraction of β-Ti is continuously increased, which induced improving mechanical properties both strength and plasticity. Especially, (Ti<sub>82sub>Sn<sub>18sub>)<sub>91sub>Nb<sub>9sub> alloy has the outstanding combination of the high strength (σ<sub>ysub>≈1.1 GPa) and large plasticity (ε<sub>psub>≈36%) at room temperature.