| 학회 |
한국재료학회 |
| 학술대회 |
2012년 봄 (05/17 ~ 05/18, 무주덕유산리조트) |
| 권호 |
18권 1호 |
| 발표분야 |
E. 구조 재료(Structural Materials) |
| 제목 |
Improvement of the mechanical properties of Ti-Fe-Sn alloys by dendrite phase selection |
| 초록 |
Nanostructure-dendrite composites consisting of micron-scale primary dendrites in an ultrafine eutectic matrix have been highlighted due to an extraordinary good mechanical property compared to conventional microcrystalline materials. The evolution of the nanostructure-dendrite composite have shown that the strength and plasticity of the material are strongly related to the occurrence of the slip/shear bands in the micron-scale dendrites and the propagation of shear bands in the ultrafine eutectic matrix. Therefore, a large number of approaches have been extensively conducted in order to improve the mechanical properties, such as addition of minor elements (Sn, Nb, Co, etc.). In this paper, Ti-Fe-Sn nanoeutectic composites with different amounts of the elements contents each other have been fabricated base on the Ti-Fe-Sn phase diagram previously studied. We focus on understanding the influence on the mechanical properties in Ti-Fe-Sn nanoeutectic composite by the micro dendrite phase selection in ultrafine eutectic matrix. Microstructural investigation reveals that β-Ti primary dendrite in eutectic matrix consists of TiFe and β-Ti for Ti72Fe22Sn6 alloy. Similarly, The Ti64Fe32Sn4 alloy and Ti68Fe23Sn9 alloy consists of TiFe and Ti3Sn micron-scale primary dendrites uniformly embedded in the TiFe and β-Ti eutectic structure. These microstructural changes lead to different deformation behavior in primary dendrite. Therefore, it is believed that the mechanical properties of Ti-Fe-Sn alloys could improve through the minute compositional tuning of Ti-Fe-Sn alloys. |
| 저자 |
이찬호1, 송기안2, 한준희3, 박은미4, 김기범5
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| 소속 |
1세종대, 2Department of Materials Science and Engineering, 3the Univ. of Tennessee, 4Knoxville, 5TN |
| 키워드 |
Ultrafine eutectic structure; Mechanical properties; Microstructure; Composites
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| E-Mail |
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