Mechanical property of nanoscale precipitate hardening aluminum alloys

• Published in: Scripta materialia Vol. 44; no. 8-9; pp. 1489 - 1492
• Main Authors: ADACHI, Hiroki, OSAMURA, Kozo, OCHIAI, Shojiro, KUSUI, Jun, YOKOE, Kazuhiko
• Format: Conference Proceeding Journal Article
• Language: English
• Published: New York, NY Elsevier Science 18.05.2001
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Deformation and plasticity (including yield, ductility, and superplasticity); Exact sciences and technology; Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Metals. Metallurgy; Physics; Aluminium base alloys; Consolidation; Composite materials; Mechanical properties; Nanostructures; Experimental study; Powder metallurgy; Precipitation hardening; Dispersion strengthened metal
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/s1359-6462(01)00715-1

Until now, several attempts have been carried out in order to improve the mechanical properties of AlZnMgCu powder metallurgy (P /M) processed alloys. Recently the authors' group demonstrated the development of extremely high strength AlZnMgCu alloys (Mesoalite) (Kusui et al., 1996). The strength was suggested to be related to the multiple effects of precipitation hardening and fiber reinforcement, as well as fine grain strengthening. This study focuses on clarifying the contribution of nanoscale precipitates to the mechanical properties. It is found that nanoscale coherent particles are very effective in obtaining high-strength materials. A compression test showed a tensile strength as high as 1033 MPa for these aluminum alloys. (CSA)