کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
827862 1470276 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel cast-aged MnCuNiFeZnAl alloy with good damping capacity and high usage temperature toward engineering application
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Novel cast-aged MnCuNiFeZnAl alloy with good damping capacity and high usage temperature toward engineering application
چکیده انگلیسی


• Novel as-cast Mn26Cu2Ni2Fe2Zn3Al high-damping alloy is designed and developed.
• Heat treatment has a key effect on its damping capacity and usage temperature.
• Largest internal friction and highest usage temperature are obtained simultaneously.
• High Mn segregation causes large lattice distortion and high phase transition point.
• It has great implication for design of high-performance Mn-Cu based damping alloys.

Novel cast-aged Mn-26.0Cu-2.0Ni-2.0Fe-2.0Zn-3.0Al (wt.%) alloy with good damping capacity and high usage temperature has been well designed and developed in this work, which can act as a promising candidate toward engineering applications. The microstructure, damping capacity and usage temperature were investigated systematically by X-ray diffraction, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, and dynamic mechanical analyzer. The results show that heat treatment has a significant influence on the damping capacity and usage temperature of as-cast MnCuNiFeZnAl alloy. Compared to the original as-cast alloy with internal friction (Q− 1) of 3.0 × 10− 2 at a strain amplitude ε = 2 × 10− 4 and usage temperature of 43 °C, the largest Q− 1 (5.0 × 10− 2) and highest usage temperature (70 °C) can be obtained simultaneously by ageing treatment at 435 °C for 2 h, while homogenization-ageing, solution-ageing and overageing can just result in the limited improvement of damping capacity and usage temperature. This is because the highest nanoscale Mn segregation in Mn dendrites can be formed by spinodal decomposition during ageing, while carrying out the homogenization or solution treatment prior to the ageing, as well as overageing treatment can cause the weakening of Mn segregation at the macro/nano-scale and even the precipitation of α-Mn, thus leading to the undesirable damping capacity and usage temperature.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 106, 15 September 2016, Pages 45–50
نویسندگان
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