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| STABILIZATION OF MARTENSITE AND PARENT PHASE ORDERING IN A Cu-Zn-Al ALLOY |
| CHEN Shuchuan;XU Zuyao T. Y. Hsu; YANG Fan Shanghai Jiaotong University; ZHANG Jihua Shanghai Institute of Metallurgy; Academia Sinica |
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Cite this article:
CHEN Shuchuan;XU Zuyao T. Y. Hsu; YANG Fan Shanghai Jiaotong University; ZHANG Jihua Shanghai Institute of Metallurgy; Academia Sinica. STABILIZATION OF MARTENSITE AND PARENT PHASE ORDERING IN A Cu-Zn-Al ALLOY. Acta Metall Sin, 1991, 27(4): 5-10.
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Abstract The reverse transformation has never occurred in a quenched and agedspecimen heating from room temperature to 320℃ at which the martensite disap-pears thoroughly. Both B2?9R and DO_3?18R coexist in step-quenched and short-timeisothermally treated specimen. As prolonging the isothermally holding, the B2?9Rdisappears and DO_3?18R intensifies. B2?9R occurs only in specimen quenched andup-quenched immediately to 100--150℃. Rapid quenching from high temperaturewill depress the B2→DO_3 ordering but not the A2→B2 one. A more enough concen-tration of vacancy is a necessary condition of occurrence of B2→DO_3 ordering. Thepossible mechanism for stabilization of martensite in Cu-Zn-Al alloy was alsodiscussed.
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Received: 18 April 1991
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9 1969; 27: 141 |
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