| 固溶处理对TiB2/7050Al复合材料组织与性能的影响 |
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| 引用本文： | 杨苗,林茂,孙福德,刘钧,陈哲,王浩伟.固溶处理对TiB2/7050Al复合材料组织与性能的影响[J].金属热处理,2023,48(4):53-59. |
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| 作者姓名： | 杨苗 林茂 孙福德 刘钧 陈哲 王浩伟 |
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| 作者单位： | 1.上海交通大学 材料科学与工程学院, 上海 200240;2.西北铝业有限责任公司, 甘肃 陇西 748111 |
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| 基金项目： | 国家自然科学基金(52101179,51971137) |
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| 摘 要： | 研究了固溶处理对TiB2/7050Al复合材料组织与性能的影响规律。结果表明，TiB2/7050Al复合材料内的可溶性第二相主要为MgZn2(η相)、AlZnMgCu(T相)和Al2CuMg(S相)。η相在470℃已完全溶解，T相在476℃开始溶解，S相在491℃下可完全溶解。随固溶温度的升高，复合材料的强度整体呈上升趋势，但伸长率先增加后降低。在480℃固溶时，复合材料同时具备高强度和高塑性，其屈服强度、抗拉强度和伸长率分别为658 MPa、719 MPa和11.3%;继续升高固溶温度至490℃,虽然可使铝基体内残余S相完全溶解，但也使基体再结晶晶粒异常长大，降低了复合材料的塑性。
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| 关 键 词： | TiB2/7050Al复合材料 固溶处理 微观组织 力学性能 |
| 收稿时间： | 2022-10-08 |
Effect of solution treatment on microstructure and properties of TiB2/7050Al composite |
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| Yang Miao,Lin Mao,Sun Fude,Liu Jun,Chen Zhe,Wang Haowei.Effect of solution treatment on microstructure and properties of TiB2/7050Al composite[J].Heat Treatment of Metals,2023,48(4):53-59. |
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| Authors: | Yang Miao Lin Mao Sun Fude Liu Jun Chen Zhe Wang Haowei |
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| Affiliation: | 1. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Northwest Aluminium Corporation Limited, Longxi Gansu 748111, China |
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| Abstract: | Effect of solution treatment on microstructure and properties of TiB2/7050Al composite was studied. The results show that the soluble phases in the TiB2/7050Al composite are mainly MgZn2(η phase), AlZnMgCu(T phase) and Al2CuMg(S phase). The η phase can dissolve completely below 470 ℃. The T phase begins to dissolve at 476 ℃, and the S phase can dissolve completely at 491 ℃. With the increase of solution treatment temperature, the strength of the composite increases, but the elongation increases firstly and then decreases. When solution treated at 480 ℃, the composite has both high strength and high plasticity, with its yield strength, tensile strength and elongation being 658 MPa, 719 MPa and 11.3%, respectively. Further increasing the solution treatment temperature to 490 ℃, though the residual S phase completely dissolves in the Al matrix, but the elevated temperature promotes the recrystallized grains to grow abnormally, inducing low plasticity of the composite. |
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| Keywords: | TiB2/7050Al composite solution treatment microstructure mechanical properties |
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