Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys

LIU Huimin; HAO Bin; YANG Bin; ZHANG Jishan

doi:10.13374/j.issn1001-053x.2006.04.014

Volume 28 Issue 4

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LIU Huimin, HAO Bin, YANG Bin, ZHANG Jishan. Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys[J]. Chinese Journal of Engineering, 2006, 28(4): 369-372. doi: 10.13374/j.issn1001-053x.2006.04.014

Citation:

LIU Huimin, HAO Bin, YANG Bin, ZHANG Jishan. Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys[J]. Chinese Journal of Engineering, 2006, 28(4): 369-372. doi: 10.13374/j.issn1001-053x.2006.04.014

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Refinement mechanism of in-situ TiC particles on the microstructure of spray formed 7075 Al alloys

doi: 10.13374/j.issn1001-053x.2006.04.014

1. School of Materials Science and Engineering, Inner Mongolia University of Technology, Huhehaote 010062, China;
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2005-05-04
Rev Recd Date: 2005-06-28

Available Online: 2021-08-24

Abstract

Abstract

The microstructure of an in-situ reactive spray formed TiCp/7075 (TiCp = 2.91% in volume fraction) Al alloy was observed using SEM. The grain sizes were measured by Image Tool software and a mean linear intercept method and compared with that of spray formed 7075 Al alloys. The result showed that the grain size of the former alloy was decreased 50 % compared to the later. It is indicated that in-situ TiC particles play a significant role on refining the microstructure of spray formed 7075 Al alloys. The refinement mechanism was interpreted from nucleation attribute, nucleation velocity and crystallographic analysis in nucleation process.
- 7075 Al alloy,
- in-situ TiC particles,
- spray forming,
- microstructure