金属热处理 ›› 2022, Vol. 47 ›› Issue (5): 1-6.DOI: 10.13251/j.issn.0254-6051.2022.05.001

• 材料研究 •    下一篇

Ni、Fe合金化及时效时间对锰铜基阻尼合金相变行为的影响

牛红康, 王迪玮, 田青超   

  1. 上海大学 省部共建高品质特殊钢冶金与制备国家重点实验室, 上海 200444
  • 收稿日期:2021-12-13 修回日期:2022-02-27 出版日期:2022-05-25 发布日期:2022-06-16
  • 通讯作者: 田青超,教授,博士,E-mail: tctian@shu.edu.cn
  • 作者简介:牛红康(1999—),男,硕士研究生,主要研究方向为锰铜基阻尼合金,E-mail: Niuhk@shu.edu.cn。

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

Niu Hongkang, Wang Diwei, Tian Qingchao   

  1. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200444, China
  • Received:2021-12-13 Revised:2022-02-27 Online:2022-05-25 Published:2022-06-16

摘要: 使用真空感应炉制备了Mn-20Cu、Mn-20Cu-5Ni、Mn-20Cu-5Ni-2Fe三种不同成分梯度的合金,利用动态机械分析仪测量了弹性模量及内耗与温度之间的关系,以研究化学成分及时效时间对合金反铁磁转变及马氏体相变的影响。结果表明,合金的相变特征温度和时效时间的平方根正相关,添加的合金元素通过影响调幅分解过程中溶质原子的扩散从而对特征温度发生作用,描述振荡应力和相界面之间耦合强度的l值是反映阻尼合金材料的关键因素之一。

关键词: MnCu基阻尼合金, 相变, 时效处理, 弹性模量

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

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