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压力对Al-5.0Cu-0.4Mn-0.1Ti-0.1RE-0.25V合金组织和力学性能的影响 |
Effect of Pressures on the Microstructures and Mechanical Properties of Al-5.0Cu-0.4Mn-0.1Ti-0.1RE-0.25V Alloy |
Received:November 15, 2015 Revised:January 10, 2016 |
DOI:10.3969/j.issn.1674-6457.2016.01.009 |
中文关键词: 聚醚醚酮 改性 成型加工 性能研究 |
英文关键词: pressure grain size microstructure property |
基金项目:国家自然科学基金 (51374110); 广东省自然科学基金研究团队项目 (2015A030312003) |
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中文摘要: |
目的 以 Al-5.0Cu-0.4Mn-0.1Ti-0.1RE-0.25V 合金为研究对象, 分析其在挤压压力为 0,50, 100 MPa 时的合金组织及力学性能。方法 试验采用拉伸性能测试、 宏观腐蚀、 金相显微镜(OM)、 扫描电镜(SEM)、 能谱(EDS)等测试方法进行研究。结果 提高挤压压力能明显细化铸态合金的晶粒, 提高合金的抗拉强度、 屈服强度及伸长率; 挤压压力为100 MPa时的合金相对于50MPa时的合金, 不论是晶粒细化程度还是力学性能提升效果均不明显; V在合金中的溶解度较低,在合金中积聚生成的微米级初生Al10V在拉伸过程中部分发生断裂, 对合金的力学性能不利。结论 当挤压力为50 MPa时, 合金可获得较好的力学性能。 |
英文摘要: |
The microstructure and mechanical properties of Al-5.0Cu-0.4Mn-0.1Ti-0.1RE-0.25V alloy which aimed at 0, 50, and 100 MPa were studied in this paper. Tensile test,macro corrosion,optical microscope(OM), scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)were used. The results show that the increase of the squeeze pressure can obviously refine the grain size,improve the tensile strength,yield strength and elongation of the alloy,but the 100 MPa alloy is not significantly improved with the increase of the grain size and mechanical properties compared with 50 MPa alloy. The solubility of V in the alloy is low,and the formation of micron grade primary Al10V phase is accumulated in the alloy,which can be broken in the fracture process, which is not conducive to the improvement of the mechanical properties of the alloy. When the squeeze pressure was 50 MPa,the better mechanical properties of the alloy were obtained. |
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