Effect of alloying of nickel and iron and aging time on phase transformation behaviour of MnCu based damping alloy

doi:10.13251/j.issn.0254-6051.2022.05.001

Abstract

Abstract: Three alloys with different composition gradients of Mn-20Cu, Mn-20Cu-5Ni and Mn-20Cu-5Ni-2Fe were prepared, the relationships between elastic modulus and internal friction versus temperature were measured by using a dynamic mechanical analyzer to investigate the effects of chemical composition and aging time on antiferromagnetic transformation and martensitic transformation of the alloys. The results show that the characteristic phase transformation temperature of the three alloys is positively correlated with the square root of the aging time, the alloying elements act on the characteristic temperature by influencing the diffusion of solute atoms during spinodal decomposition and that the l-value describing the coupling strength between applied oscillating stress and phase interface is one of the key factors reflecting the damping alloy material.

Key words: MnCu based damping alloy, phase transformation, aging treatment, elastic modulus

CLC Number:

TG146

Niu Hongkang, Wang Diwei, Tian Qingchao. Effect of alloying of nickel and iron and aging time on phase transformation behaviour of MnCu based damping alloy[J]. Heat Treatment of Metals, 2022, 47(5): 1-6.

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