Effect of equal channel angular pressing and heat treatment on the microstructure of Cu–Al–Be–B shape memory alloy |
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| Authors: | Ping Zhang Aibin Ma Sheng Lu Pinghua Lin Jinghua Jiang Hu Ma Chenglin Chu |
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| Affiliation: | aCollege of Materials Science and Engineering, Hohai University, Nanjing 210098, China;bSchool of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;cCollege of Materials Science and Engineering, Southeast University, Nanjing 210018, China |
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| Abstract: | The combination of equal channel angular pressing (ECAP) and heat treatment was carried out to modify the microstructure of a Cu–Al–Be–B shape memory alloy. Microstructures of the alloy after ECAP and subsequent quenching were investigated by optical microscopy and X-ray diffraction (XRD). The alloy with 8 passes of ECAP at 743 K is characterized with ultra-fine grains (~ 2 μm), but with smaller fraction of martensites which implies the lower shape memory effect (SME). After reheated at 873 K and oil-quenched to room temperature, the grains become coarsen (~ 50 μm) but still finer than that of as-received (100–300 μm), and the fraction and order of martensites were increased simultaneously. |
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| Keywords: | Shape memory alloy Equal channel angular pressing Martensite Microstructure Heat treatment |
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