据Aerospace & Power Generation Market-ing Group公司的管理人 James M Dahl在国际材料和工艺学术研讨会上发表的论文指出,民用和军用航空飞行器的合金选择标准都发生了变化。在延长使用寿命、减少缺陷、降低环境污染等方面的严格要求极大地限制了材料的选择。此外,现代航空飞行器的维护和使用的低费用要求使得某些标准合金如H-11、300M等已不再受欢迎。因 According to a paper presented at the International Symposium on Materials and Processes by James M Dahl, manager of Aerospace & Power Generation Market-ing Group, the alloy selection criteria for both civilian and military aircraft have changed. The strict requirements of prolonging service life, reducing defects and reducing environmental pollution have greatly restricted the choice of materials. In addition, the low cost requirements for the maintenance and use of modern aeronautical vehicles make certain standard alloys, such as the H-11, 300M, no longer welcome. because