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<p>Cu-Mn binary alloys are attractive structural materials because they offer a cost-effective processing route together with good mechanical and tribological performance. By increasing the Mn content, high-manganese copper alloys can be developed from conventional Cu-Mn binary alloys, providing stronger solid-solution strengthening and improved potential for wear-resistant cast components. In this work, as-cast high-manganese copper alloys were used as the base alloy, and the effects of Ni and Al additions on the phase constitution, microstructural evolution, mechanical properties, and wear behavior were systematically studied. The results indicate that the combined addition of Ni and Al markedly improves the overall properties of the alloy. The Cu-30Mn-5Al-10Ni alloy exhibited the best comprehensive performance, with a hardness of 230 HV, a yield strength of 254 MPa, a tensile strength of 528 MPa, an elongation of 12%, an average friction coefficient of 0.54, and a wear rate of 1.46 × 10<sup>−12</sup> mm<sup>3</sup>·(N&#xa0;m)<sup>−1</sup>. The enhanced mechanical properties and wear resistance are mainly associated with the formation of a BCC NiAl phase, which results from the synergistic effect of Ni and Al and plays a key role in strengthening the alloy and improving its tribological behavior.</p>

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Effects of Al and Ni on Microstructure, Mechanical Properties and Wear Resistance of As-Cast High-Manganese Copper Alloy

  • 期刊论文

  • 发表日期：

    2026年5月22日

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  • Zhenglu Shi,
  • Qingchun Xiang,
  • Wei Zhang,
  • Guanglong Li,
  • Yinglei Ren,
  • Keqiang Qiu

摘要

Cu-Mn binary alloys are attractive structural materials because they offer a cost-effective processing route together with good mechanical and tribological performance. By increasing the Mn content, high-manganese copper alloys can be developed from conventional Cu-Mn binary alloys, providing stronger solid-solution strengthening and improved potential for wear-resistant cast components. In this work, as-cast high-manganese copper alloys were used as the base alloy, and the effects of Ni and Al additions on the phase constitution, microstructural evolution, mechanical properties, and wear behavior were systematically studied. The results indicate that the combined addition of Ni and Al markedly improves the overall properties of the alloy. The Cu-30Mn-5Al-10Ni alloy exhibited the best comprehensive performance, with a hardness of 230 HV, a yield strength of 254 MPa, a tensile strength of 528 MPa, an elongation of 12%, an average friction coefficient of 0.54, and a wear rate of 1.46 × 10−12 mm3·(N m)−1. The enhanced mechanical properties and wear resistance are mainly associated with the formation of a BCC NiAl phase, which results from the synergistic effect of Ni and Al and plays a key role in strengthening the alloy and improving its tribological behavior.