流变加工对ADC12合金显微组织和力学性能的影响（英文）

发布时间：2018-01-03 07:06

本文关键词：流变加工对ADC12合金显微组织和力学性能的影响（英文）　出处：《Transactions of Nonferrous Metals Society of China》2016年12期 　论文类型：期刊论文

【摘要】：通过光学显微镜、X射线衍射和扫描电镜等表征手段,研究流变加工的ADC12合金的显微组织演变和力学性能。结果表明:流变铸造和流变压铸下初生铝树枝晶得到破碎,其平均颗粒尺寸、固相率随浇注温度降低而提高。流变加工有效地提高合金的力学性能。流变铸造条件下,合金抗拉强度随着浇注温度降低而提高,在580到600°C之间浇注可以获得较高的力学性能。流变压铸条件下,595°C浇注可以获得最佳的抗拉强度和伸长率。流变加工对ADC12合金力学性能的提高主要在于实现致密度的提高和初生铝的圆整化。流变铸造和流变压铸工艺下初生铝平均颗粒尺寸与屈服强度可以通过Hall-Petch公式描述。
[Abstract]:By optical microscope, X ray diffraction and SEM, the microstructure evolution and mechanical properties of ADC12 alloy on the rheological processing. The results showed that the rheological and rheo die casting casting under the primary aluminum dendrites are broken, the average particle size, solid phase rate increases with the decrease of pouring temperature and improve effectively improve mechanical rheological processing. The rheological properties of the alloy. The casting condition, the tensile strength of the alloy increases with the decrease of pouring temperature, pouring in between 580 to 600 DEG C can obtain high mechanical properties. The rheological die casting conditions, 595 DEG C casting can obtain the best tensile strength and elongation. Improve the rheological processing on the mechanical properties of ADC12 alloy is mainly round can improve the density of primary aluminum and primary aluminum. The average particle size and yield strength of casting and rheological die casting process under the rheological formula by Hall-Petch Description.

【作者单位】：上海交通大学轻合金精密成型国家工程研究中心与金属基复合材料国家重点实验室;
【基金】：Project(51404153)supported by the National Natural Science Foundation of China
【分类号】：TG146.21;TG292
【正文快照】： 1 Introduction In the past decades,the replacement of iron and steel by aluminum in automotive industry has been increasing due to its contribution to mass reduction and lower gas emission[1,2].As one kind of Al-Si alloys,the ADC12 aluminum alloy is ext

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