论文部分内容阅读
本文第一部分讲述了传统力学性能指标所存在的问题,它不能准确地反映材料的真实性能。因此,材料在使用中过早地产生破坏。接着讲述了断裂力学在测定材料断裂韧度、抗疲劳和抗应力腐蚀性能中的作用,以及在设计工作中如何选择材料的性能指标。所讲内容都是一些粗浅的基本概念。文章的第二部分主要介绍了如何改进航空工业上所用的Al-Cu(2×××)系和Al-Zn-Mg-Cu(7×××)系高强度变形铝合金断裂韧度、疲劳强度和抗应力腐蚀性能。文章最后提出了改进高强度变形铝合金的一些具体方案。所谈内客基本上反映了国外二十来年发展铸锭冶金高强度变形铝合金的概貌和所取得的大部分成就。
The first part of this paper describes the problems existing in the traditional mechanical performance index, which can not accurately reflect the true performance of the material. Therefore, the material prematurely causes damage during use. Then, the role of fracture mechanics in determining the fracture toughness, fatigue resistance and stress corrosion resistance of materials, and how to choose the material properties in the design work are described. The content is some superficial basic concepts. The second part of the article mainly introduces how to improve the fracture toughness and fatigue of Al-Cu (2 ×××) and Al-Zn-Mg-Cu (7 ×××) Strength and stress corrosion resistance. Finally, some specific solutions to improve high-strength deformation aluminum alloy are put forward. Insiders basically reflect the foreign development in the past 20 years the development of ingot metallurgy high-strength aluminum alloy profile and most of the achievements made.