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Effect of Cr Content on Microstructure and Mechanical Properties of Al-Cu-Mg-Ag Alloy with a Low Cu/Mg Ratio
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Guoqiang YANG, Zhiyi LIU, Song BAI, Suwang LI, Jing CAO
Mining and Metallurgical Engineering | 2025, 45(2) : 193 - 196
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Mining and Metallurgical Engineering | 2025, 45(2): 193-196
• MATERIALS •
Effect of Cr Content on Microstructure and Mechanical Properties of Al-Cu-Mg-Ag Alloy with a Low Cu/Mg Ratio
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Guoqiang YANG, Zhiyi LIU, Song BAI, Suwang LI, Jing CAO
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  • School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
Published: 2025-04-01 doi: 10.3969/j.issn.0253-6099.2025.02.034
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The effect of Cr content in mass fraction on the microstructure and mechanical properties of Al-Cu-Mg-Ag alloy with a low Cu/Mg ratio was investigated. Results indicate that after an addition of Cr to the Al-Cu-Mg-Ag alloy with low Cu/Mg ratio, phases of Al-Cr and Al1.6TiCr0.4 are generated in the alloy; with Cr content from 0.17% up to 0.22%, the alloy has its tensile strength improved from 463 MPa to 484 MPa (a 4.5% increase), and its yield strength enhanced from 288 MPa to 319 MPa (a 10.8% increase). The enhancement in mechanical properties is attributed to solid solution strengthening by Cr and precipitation strengthening by S′ phases.

microalloying  /  Cu/Mg ratio  /  solid solution strengthening  /  precipitation strengthening  /  Cr  /  Al-Cu-Mg-Ag alloy  /  precipitate  /  under-aging  /  mechanical property
Guoqiang YANG, Zhiyi LIU, Song BAI, Suwang LI, Jing CAO. Effect of Cr Content on Microstructure and Mechanical Properties of Al-Cu-Mg-Ag Alloy with a Low Cu/Mg Ratio[J]. Mining and Metallurgical Engineering, 2025 , 45 (2) : 193 -196 . DOI: 10.3969/j.issn.0253-6099.2025.02.034
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Year 2025 volume 45 Issue 2
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doi: 10.3969/j.issn.0253-6099.2025.02.034
  • Receive Date：2024-09-28
  • Online Date：2026-03-19
  • Published：2025-04-01
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  • Received：2024-09-28
Affiliations
    School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China
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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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