Design optimization of cast Cu-Al-Be-B alloys for high clamping capacity

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Design optimization of cast Cu-Al-Be-B alloys for high clamping capacity

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This paper investigated high-damping Cu-Al-Be-B cast alloys using metallographic analysis, X-ray diffraction (XRD) and electrical resistance measurements for transformation temperatures. The results showed that beryllium can stabilize β phase, resulting in a thermo-elastic martensite microstructure leading to high-damping capacity in cast Cu-Al-BeB alloys. Trace additions of boron to Cu-Al-Be alloys can significantly refine the grains, providing high strength and ductility to the alloys. A factorial design of experiment method was used to optimize the composition and properties of cast Cu-Al-BeB alloys. The optimal microstructure for thermo-elastic martensite can be obtained by adjusting the amounts of aluminum and beryllium to eutectoid or pseudo-eutectoid compositions. An optimized cast Cu-Al-Be-B alloy was developed to provide excellent mechanical properties, tensile strength σb = 767 MPa, elongation δ = 7.62 %, and damping capacity S. D.C =18.70%.

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《中国铸造》 |2004年第2期|32-37|共6页
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Department of Materials Engineering, East China Ship Building Institute of Technology, Zhenjiang ,212003, Jiangsu,P. R . China;

Department of Mechanical Engineering, Southeast University, Nanjing ,210096, Jiangsu, P. R. China;

Department of Materials Engineering, East China Ship Building Institute of Technology, Zhenjiang ,212003, Jiangsu,P. R . China;

Department of Materials Engineering, East China Ship Building Institute of Technology, Zhenjiang ,212003, Jiangsu,P. R . China;

Department of Mechanical Engineering, Southeast University, Nanjing ,210096, Jiangsu, P. R. China;

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正文语种 chi
中图分类铸造;
关键词
Cu-Al-Be-B alloys; damping capacity; mechanical property; thermo-elastic martensite; grain refining; shape memory alloys (SMA);

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Design optimization of cast Cu-Al-Be-B alloys for high clamping capacity

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