The effect of non-isothermal aging on the β phase of Cu73Al24Mn3 alloy

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 467; no. 1-2; pp. 104 - 107
• Main Authors: PAN, Z. Y, LI, Z, WANG, M. P, DENG, C. P, LI, S. H, ZHENG, F
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier 15.10.2007
• Subjects: Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Precipitation; Solid solution, precipitation, and dispersion hardening; aging; Treatment of materials and its effects on microstructure and properties; Beta phase; XRD; Heat treatments; Shape memory effects; β phase; Optical microscopy; Precipitation; Non-isothermal aging; Copper alloys; Transition elements; Shape memory effect; Aging; γ2 phase; Transition element alloys; Cu-Al-Mn
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2007.02.123

The effect of non-isothermal aging on the beta phase of Cu73Al24Mn3 alloy has been studied by means of rho-T curve, X-ray diffraction and optical microscopy observation. The results show that the parent phase of the tested alloy is stable and hard to decompose during aging. As the alloy being heated to 620 deg C at a heating-rate of 5 deg C/min, only gamma2 phase precipitates, the eutectoid reaction (beta- > alpha+gamma2) does not take place; shape memory effect (eta) of 92% has been achieved and measured. The martensitic characteristic temperatures, Mf, Ms, As and Af, increase slightly during early period of aging, and almost remain unchanged afterwards.