Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract： Evolution of drawing texture for A6 aluminum conductor with the drawing process was investigated by macro and micro-texture analysis. The results show that the fiber-like deformation texture of <111> and <100> formed in the drawing process, and <100> texture reduced while <111> texture enhanced with the increasing strain. The distribution of deformed texture was of homogeneity along the radial direction of wire: the deform texture transformed from strong <100> texture (~52% volume fraction) in the surface to strong <111> texture (~55%) in the center by moderate strains; the radial gradient texture was weakened and a strong <111> texture (>70%) formed in the overall wire by high strains. Moreover, the core hardness of the wire was higher than that of the surface, which attributed to the texture gradient distribution along the radial. Adjusting the drawing process to optimize the dislocation density and texture as well as their distribution in the wire is an effective route to improve the strength and conductive properties of the A6 aluminum conductor.
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-09 Cooperative journals: 《中国腐蚀与防护学报》
Abstract：本文从氧化动力学、氧化膜相组成及微观结构方面，研究了晶粒尺寸对18Cr-8Ni耐热钢在700 oC下的高温水蒸汽中的氧化行为的影响。研究表明：（1）晶粒细化提高了耐热钢的抗水蒸汽氧化性能，降低了其氧化增重，推迟了失稳氧化的发生；（2）晶粒细化改变了耐热钢的氧化膜的微观结构，减小了“弹坑”区的尺寸且促进了“弹坑”区与合金界面上富Cr氧化物层的形成；（3）晶粒细化对耐热钢的抗水蒸汽氧化性能的改善主要归因于其对氧化物的形核和Cr向氧化膜/合金界面的扩散的促进作用。
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