| 刘福广1， 杨二娟1， 李勇1， 米紫昊1， 刘刚1，
[JZ]吴晓俊1， 付顺利2， 成小乐3*， 郭飞飞3， 王思佳3.热处理对不同体积分数B4C增强铝基复合材料组织和力学性能的影响[J].轻工机械,2023,41(3):41-48 |
| 热处理对不同体积分数B4C增强铝基复合材料组织和力学性能的影响 |
| 热处理对不同体积分数B4C增强铝基 复合材料组织和力学性能的影响 |
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| DOI：10.3969/j.issn.1005 2895.2023.03.006 |
| 中文关键词: 热处理 B4C增强铝基复合材料 微观组织 力学性能 |
| 英文关键词:heat treatment B4C reinforced aluminum matrix composites microstructure mechanical property |
| 基金项目:中国华能集团科技项目（HNKJ20 H47）；中国华能集团科技项目（TN 20 TYK09）。 |
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| 中文摘要: |
| 为了探究热处理对碳化硼颗粒增强铝基复合材料（B4C/6061Al）性能的影响，课题组选择体积分数分别为100%，175%，250%和310%的B4C增强铝基复合材料进行热处理（535 ℃保温50 h后温水淬，165 ℃时效45 h），采用扫描电子显微镜(SEM)观察复合材料的微观组织形态，并运用万能拉伸试验机测试其力学性能。研究结果表明：随着B4C体积分数的增加，B4C颗粒呈现聚集、破碎和剥落现象；热处理后的B4C/6061Al 复合材料的强度随着B4C体积分数的增加而提升，延伸率随B4C体积分数的增加则呈下降的趋势。B4C体积分数为100%时，复合材料的屈服强度和抗拉强度分别是2208和2460 MPa，延伸率为1176%；当B4C体积分数增加至310%时，复合材料的屈服强度和抗拉强度分别为3302和3583 MPa，延伸率为218%。热处理之后，复合材料发生了动态再结晶，B4C增强颗粒周围出现高位错密度区域。 |
| 英文摘要: |
| In order to analyze the effect of heat treatment on the properties of boron carbide (B4C) particle reinforced aluminum matrix composites (B4C/6061Al), B4C reinforced aluminum matrix composites with volume fractions of 100%, 17.5%, 25.0%, and 31.0% were selected for heat treatment (held at 535 ℃ for 5.0 h, quenched with warm water, aged at 165 ℃ for 4.5 h). The microstructure of the composites was observed by scanning electron microscope (SEM), and the mechanical properties were tested by universal tensile testing machine. The results show that with the increase of B4C volume fractions, B4C particles show aggregation, fragmentation and exfoliation. The strength and elongation of B4C/6061Al composites after heat treatment increase with the increase of B4C volume fraction. When volume fraction of B4C is 10.00%, the yield strength and tensile strength of the composite are 220.8 and 246.0 MPa, respectively, and the elongation is 11.76%. When the volume fraction of B4C increased to 31.00%, the yield strength and tensile strength of the composite are 330.2 and 358.3 MPa, respectively, and the elongation is 218%. After heat treatment, dynamic recrystallization occurs and high dislocation density regions appear around B4C reinforced particles. |
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