Development of a dispersion strengthened copper alloy using a MA-HIP method

• Published in: Nuclear materials and energy Vol. 9; no. C; pp. 455 - 458
• Main Authors: Yamada, T., Noto, H., Hishinuma, Y., Muroga, T., Nakamura, H.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-12-2016; Elsevier
• Subjects: Copper alloy; Dispersion strengthening; Heat sink materials; Mechanical alloying; Heat sink materials; Dispersion strengthening; Mechanical alloying; Copper alloy
• ISSN: 2352-1791; 2352-1791
• DOI: 10.1016/j.nme.2016.05.007

•A new Cu-Al alloy was fabricated by MA and HIP method for application to the heat sink materials of divertors.•With the increase in MA time, the grain size and Vickers hardness decreased and increased, respectively.•At MA time of 32hrs, the hardness was comparable to that of Gidcop® although the grain size is much larger.•Al-rich precipitates were formed with MA time of 32hrs. Lattice constant and electrical resistivity were changed accordingly.
A new Cu-Al alloy was fabricated by a MA-HIP method for application to the heat sink materials of divertors. With the increase in MA time, the grain size and Vickers hardness decreased and increased, respectively. At MA time of 32hrs, the hardness of the alloy was comparable to that of Glidcop® although the grain size was much larger. X-ray diffractometry, electrical resistivity measurements and STEM-EDS analyses suggested precipitation of Al-rich phase by MA for 32hrs followed by HIP.