Novel cast-aged MnCuNiFeZnAl alloy with good damping capacity and high usage temperature toward engineering application

Significance Statement

Damping capacity is the ability of a material to absorb energy by converting mechanical energy into heat. A high damping capacity can be mainly attributed to mobility of internal boundaries, such as magnetic domain boundaries, twin boundaries and phase boundaries. Alloying and heat treatment process are said to have a significant influence on damping capacity and usage temperature.

Professor Wenbo Liu and colleagues from Sichuan University in collaboration with researchers at The Hong Kong Polytechnic University and Beijing Institute of Technology recently developed a novel cast-aged MnCuNiFeZnAl alloy with good damping capacity and high usage temperature, and meanwhile systematically investigated the heat treatment process dependency of its damping capacity and usage temperature. According to the team, a lot of work has been done on damping alloys in the past decades, especially as-forged M2052, a typical Mn-Cu based high-damping alloy with relatively low Mn content. Compared to the forging technique, one-step molding casting had exhibited distinct advantages of simple manufacturing process, low integrated cost and high production efficiency. However, they observed that the M2052 alloy to be defective in castability. The research work is now published in the journal Materials and Design.

To solve this issue, the research team suggested to introduce Zn and Al elements into the M2052 alloy matrix, they were able to come up with MnCuNiFeZnAl alloy. The alloy was prepared by vacuum induction melting with pure metals in an inert argon atmosphere and X-ray diffraction was used to identify phase structure and lattice parameter of specimens. The team said, it is first to report the novel as-cast MnCuNiFeZnAl high-damping alloy and systematically research their damping capacity by dynamic mechanical analysis under different heat treatment conditions using a test frequency of 1 Hz.

The researchers noted an evident positive correlation in the specimen internal friction with increase of strain amplitude, indicative of the strain-amplitude-dependent damping capacity.

According to their findings, the optimal damping capacity (Q-1=5.0×10-2 at ε=2×10-4) of the as-cast MnCuNiFeZnAl alloy can be achieved by ageing at 435°C for 2 h (just a very simple heat treatment process), much higher than those obtained in the conventional as-forged M2052 high-damping alloy. In this case, the maximal nanoscale Mn segregation can be formed in Mn dendrites by spinodal decomposition. They also found out that the usage temperature has very similar change tendency with the lattice distortion and internal friction, which critically depends on the Mn content in Mn-Cu based alloys.

The results of this study indicated that good damping capacity and high usage temperature can be obtained simultaneously in the novel cast-aged MnCuNiFeZnAl alloy, implying that the newly developed MnCuNiFeZnAl alloy system is a promising candidate of Mn-Cu based high-damping alloys toward engineering applications.

This study developed a kind of novel as-cast MnCuNiFeZnAl high-damping alloy system and provided profound understanding of damping mechanism of as-cast Mn-Cu based alloys.

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (11076109), the “Hong Kong Scholars Program” Funded Project (XJ2014045, G-YZ67), and the Talent Introduction Program of Sichuan University (YJ201410).

Novel cast-aged MnCuNiFeZnAl alloy with good damping capacity and high usage temperature toward engineering application (Advances in Engineering)

About the author

Wenbo Liu received his Ph.D. in Materials Science from Sichuan University in 2011, and worked as a postdoctoral fellow in Beijing University of Aeronautics & Astronautics from 2011 to 2014. In Jan 2014 he was appointed Associate Professor at Sichuan University and then became a senior research scientist at The Hong Kong Polytechnic University since February 2015.

His current research focus is advanced metal functional materials mainly including two aspects as follows: (1) nanostructured metal materials from fabrication to scientific understanding and to potential applications and (2) Mn-Cu based damping alloys from material design to technology development and to engineering applications.

He has published over 60 journal papers in peer-reviewed good journals, such as Journal of Power Sources, Corrosion Science, Electrochimica Acta, Materials & Design, Microporous and Mesoporous Materials, Journal of The Electrochemical Society, Journal of Alloys and Compounds, and so on. His papers are cited with a total ISI citation of over 350 by Jan 2017 and an H-index of 12. He is a holder of 2 Chinese patents while having 5 patent applications pending. Prof. Liu received several prizes and awards including the Hong Kong Scholars Award for his achievements in the field of Materials Science and Engineering in 2014. He is a life member of AASCIT, and is an editorial board member in IJEES.

About the author

Ning Li obtained his Ph.D in Metal Materials from the School of Materials Science and Engineering at Sichuan University in 2000. He is now a Professor of Materials Science and Metallurgy, and Director of Functional Materials Research Center at Sichuan University.

His research interests focus on advanced functional nanomaterials, damping alloys, dental casting alloys, 3Y-TZP ceramic and ceramic/metal brazing technology. Prof. Li has worked extensively with functional materials for commercial applications.

About the author

Jiazhen Yan obtained his M.Sc. and Ph.D in Materials Science from the School of Materials Science and Engineering at Sichuan University in 2005 and 2008 respectively. His doctoral research focused on preparation and modification of vanadium dioxide films which act as infrared light switch materials. From 2008 to 2017, he is a researcher in the School of Manufacturing Science and Engineering at Sichuan University, and his current research interests include porous nanomaterials, damping alloys and active brazing technology for ceramic/metal joints.

About the author

Sanqiang Shi received his B.Sc. and M.Sc. from University of Science and Technology Beijing in 1982 and 1984 respectively, and Ph.D. in Materials Science from McMaster University, Canada in 1991. He then spent 7 years at Atomic Energy of Canada Limited (AECL) as a research scientist. Prof. Shi became a faculty member in the Department of Mechanical Engineering at The Hong Kong Polytechnic University since November 1998.

He is now the Chair Professor of Mechanical Engineering and Head of the Department. Prof. Shi’s current research is focused on environmental degradation of materials, computational materials modelling and advanced materials development.

Journal Reference

Wenbo Liu1,2, Ning Li1, Zhenyu Zhong1, Jiazhen Yan1, Dong Li1, Ying Liu3, Xiuchen Zhao3, Sanqiang Shi2, Novel cast-aged MnCuNiFeZnAl alloy with good damping capacity and high usage temperature toward engineering application, Materials and Design 106 (2016) 45 –50.

Show Affiliations
  1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu, 610065, PR China
  2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
  3. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR China

 

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