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Evolution of microhardness and microstructure in a cast AL-7% Si alloy during high-pressure torsion.(NANOSTRUCTURED MATERIALS)

Mungole, Tarang ; Nadammal, Naresh ; Dawra, Kunal ; Kumar, Praveen ; Kawasaki, Megumi ; Langdon, Terence G.

Journal of Materials Science, July 1, 2013, Vol.48(13), p.4671(10) [Tạp chí có phản biện]

ISSN: 0022-2461

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  • Nhan đề:
    Evolution of microhardness and microstructure in a cast AL-7% Si alloy during high-pressure torsion.(NANOSTRUCTURED MATERIALS)
  • Tác giả: Mungole, Tarang ; Nadammal, Naresh ; Dawra, Kunal ; Kumar, Praveen ; Kawasaki, Megumi ; Langdon, Terence G.
  • Chủ đề: Alloys -- Mechanical Properties ; Specialty Metals Industry -- Mechanical Properties ; Hardness (Materials) -- Mechanical Properties
  • Là 1 phần của: Journal of Materials Science, July 1, 2013, Vol.48(13), p.4671(10)
  • Mô tả: Disks of a cast Al-7 % Si alloy were processed through high-pressure torsion (HPT) for 1/4, 1/2, 1, 5, and 10 revolutions under a pressure of 6.0 GPa and at temperatures of 298 and 445 K. The hardness of the samples after processing was significantly higher than in the cast sample, and the hardness profiles across the samples became more uniform with increasing numbers of turns. Processing at higher temperature gave lower hardness values. Experiments were conducted to examine the effects of HPT processing on various microstructural aspects of the cast Al-7 % Si alloy such as the grain size, the Taylor factor, and the fraction of high-angle grain boundaries. The results demonstrate that there is a correlation between trends in the microhardness values and the observed microstructures.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461

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