期刊
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
卷 3, 期 4, 页码 311-318出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmrt.2014.06.002
关键词
Hardness; High-pressure torsion; Homogeneity; Severe plastic deformation
资金
- Hanyang University (HY)
- R&D Convergence Program of MSIP of Republic of Korea [B551179-11-02-00]
- National Science Foundation of the United States [DMR-1160966]
- European Research Council under ERC [267464-SPDMETALS]
- R&D Convergence Program of ISTK of Republic of Korea [B551179-11-02-00]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1160966] Funding Source: National Science Foundation
The processing of metals through the application of high-pressure torsion (HPT) provides the potential for achieving exceptional grain refinement in bulk metals. Numerous reports are now available demonstrating the application of HPT to a range of pure metals and simple alloys. In practice, excellent grain refinement is achieved using this processing technique with the average grain size often reduced to the true nano-scale range. Contrary to the significant grain refinement achieved in metals during HPT, the models of the hardness evolution are very different depending upon the material properties. For a better understanding of the material characteristics after conventional HPT processing, this report demonstrates the hardness evolutions in simple metals including high-purity Al, commercial purity aluminum Al-1050, ZK60A magnesium alloy and Zn-22% Al eutectoid alloy after processing by HPT. Separate models of hardness evolution are described with increasing equivalent strain by HPT. Moreover, a new approach for the use of HPT is demonstrated by synthesizing an Al-Mg metal system by processing two separate commercial metals of Al-1050 and ZK60A through conventional HPT processing at room temperature. (C) 2014 Brazilian Metallurgical, Materials and Mining Association. Published by Elsevier Editora Ltda.
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