昝宇宁,曾祥浩,毕胜,等.搅拌摩擦加工对Al2O3/B4C/Al复合材料室温及高温力学性能的影响[J].精密成形工程,2018,10(1):116-121.
ZAN Yu-ning,ZENG Xiang-hao,BI Sheng,et al.Influences of Friction Stir Processing on Mechanical Properties of Al2O3/B4C/Al Composite[J].Journal of Netshape Forming Engineering,2018,10(1):116-121. |
| 搅拌摩擦加工对Al2O3/B4C/Al复合材料室温及高温力学性能的影响 |
| Influences of Friction Stir Processing on Mechanical Properties of Al2O3/B4C/Al Composite |
| 投稿时间：2017-12-13 修订日期：2018-01-10 |
| DOI：10.3969/j.issn.1674-6457.2018.01.014 |
| 中文关键词: 铝基复合材料 粉末冶金 搅拌摩擦加工 力学性能 |
| 英文关键词: aluminum matrix composite powder metallurgy friction stir processing mechanical properties |
| 基金项目:国家重点研发计划（2017YFB0703100）；国家自然科学基金委员会-辽宁省人民政府联合基金（U1508216） |
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| 中文摘要: |
| 目的 研究搅拌摩擦加工对Al2O3/B4C/Al复合材料力学性能的影响。方法 将球形铝粉球磨成片状后氧化，并向其中混入质量分数为10%的碳化硼颗粒，热压成形后锻压，对锻饼进行一道次的搅拌摩擦加工，研究搅拌摩擦加工后复合材料的室温与高温力学性能。结果 通过搅拌摩擦加工能显著提高材料室温强度，但与锻压态材料相比，材料高温强度降低。结论 晶界处氧化铝对材料高温性能有重要影响，搅拌摩擦加工使晶界处氧化铝破碎并进入晶粒内部，提高了室温强度，但不利于提高高温性能。 |
| 英文摘要: |
| The paper aims to study influences of friction stir processing (FSP) on mechanical properties of Al2O3/B4C/Al composite. Al powder was ball-milled into flake powder and oxidized, then mixed with 10wt.% B4 Cparticles. The mixed powder was hot pressed, followed by being forged and FSPed. Mechanical properties at both high temperature and room temperature were tested. Compared with the forged samples, strength at room temperature of the FSP specimens was higher, whereas tensile strength of FSP did not increase at 375 ℃. Al2O3 on grain boundary had significant effect on tensile properties at high temperature. FSP breaks up Al2O3 layers and disperses Al2O3 into grains, leading to weak pinning effect on grain boundaries. As a result, high temperature strength creases, but it is unfavorable to improving the high temperature performance. |
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