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Effect of Zr Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy
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Shuncong LE1, Qi YU1, Jinhan ZHANG2, Pengfei ZHANG1, Anwu XI1, Fangyou ZHONG1, Yanbo HU1, Qiyang LIU1
Copper Engineering | 2026, (2) : 10 - 19
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Copper Engineering | 2026, (2): 10-19
• Material Preparation and Process Engineering •
Effect of Zr Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy
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Shuncong LE1, Qi YU1, Jinhan ZHANG2, Pengfei ZHANG1, Anwu XI1, Fangyou ZHONG1, Yanbo HU1, Qiyang LIU1
Affiliations
  • 1.JCC Processing Business Division，Nanchang 330096，China
  • 2.JCC Copper Strip Company Limited，Nanchang 330096，China
Published: 2026-04-28 doi: 10.3969/j.issn.1009-3842.2026.02.002
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Beryllium bronze faces limitations in production and application due to high manufacturing costs, complex processing, and toxic dust. In contrast, Cu-15Ni-8Sn alloy has emerged as an ideal alternative material owing to excellent comprehensive properties. This study systematically investigated the influence of 0.8% （mass fraction） Zr addition on the microstructural evolution and mechanical properties of Cu-15Ni-8Sn alloy. Results demonstrated that the as-cast alloy exhibited a dendritic structure, primarily composed of α-Cu matrix, γ-CuNi2Sn phase, and skeletal/particulate Ni4SnZr phases. After solution treatment, the dendritic structure was eliminated, with the Ni4SnZr phase retained due to thermodynamic stability, while CuNi2Sn phase completely dissolved. Aging behavior studies revealed that the alloy's hardness initially increased and then decreased with aging time. The decline was primarily attributed to the formation of discontinuous precipitation. Moreover, higher aging temperatures accelerated discontinuous precipitation, leading to reduced peak hardness. Cold rolling significantly modulated microstructural evolution: a 78% cold deformation rate suppressed discontinuous precipitation while promoting the precipitation of ordered phases, achieving a peak hardness of 383HV after aging at 400 ℃ for 1 h. However, 90% deformation induced recrystallization softening, causing hardness to decrease to 378.5HV.

Cu-15Ni-8Sn alloy  /  microstructure  /  mechanical property  /  discontinuous precipitation microstructure
Shuncong LE, Qi YU, Jinhan ZHANG, Pengfei ZHANG, Anwu XI, Fangyou ZHONG, Yanbo HU, Qiyang LIU. Effect of Zr Addition on Microstructure and Mechanical Properties of Cu-15Ni-8Sn Alloy[J]. Copper Engineering, 2026 , (2) : 10 -19 . DOI: 10.3969/j.issn.1009-3842.2026.02.002
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Article Info
doi: 10.3969/j.issn.1009-3842.2026.02.002
  • Receive Date：2025-08-07
  • Online Date：2026-09-09
  • Published：2026-04-28
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  • Received：2025-08-07
  • Revised：2025-12-19
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Affiliations
    1.JCC Processing Business Division，Nanchang 330096，China
    2.JCC Copper Strip Company Limited，Nanchang 330096，China
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https://castjournals.cast.org.cn/joweb/tygc/EN/10.3969/j.issn.1009-3842.2026.02.002
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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