• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>59th Annual World Magnesium Conference, May 19-21,2002, Montreal, Canada >Influence of Rare Earth Elements and Minor Additions on Properties and Performance of Magnesium- Yttrium Alloys in Critical Aerospace Applications
【24h】

Influence of Rare Earth Elements and Minor Additions on Properties and Performance of Magnesium- Yttrium Alloys in Critical Aerospace Applications

机译：关键航空航天应用中稀土元素和微量添加对镁钇合金性能和性能的影响

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The most significant factor in maintaining the use of high performance magnesium alloys in ever more demanding aerospace applications over the last 20 years has been the development of alloys in the Magnesium-Yttrium-Rare Earth-Zirconium alloy system by Magnesium Elektron. These alloys represented a significant advance on previously available magnesium alloys in terms of ambient temperature mechanical properties, short term and long term high temperature performance and corrosion resistance. Two alloys ELEKTRON WE54 (Mg-5% Y-4% Combined RE-Zr) and ELEKTRON WE43 (Mg-4% Y-3% Combined RE-Zr) have been commercialised and ELEKTRON WE43 particularly is now widely specified in new aerospace applications, notably for helicopter transmission components and aeroengine gearbox and related applications. ELEKTRON WE alloys are relatively complex systems by conventional commercial magnesium alloy standards. In addition to Yttrium and Zirconium, they contain a complex mixture of Rare Earth elements, which individually have specific effects on the final properties and performance of the alloy. In the course of the development of the alloys, the specific role of individual elements has been investigated and compositions optimised to meet the demanding requirements of critical aerospace components. Further insight into these effects has been gained during the design and development phase of specific aerospace components. ELEKTRON WE alloys are used in the fully heat treated (T6) condition. Again, there is an inter-relationship between composition and heat treatment parameters, which can affect the ultimate performance characteristics of the cast components. In this paper, some of the key interactions between composition, heat treatment and production parameters are reviewed in relation to their effects on: 1. Tensile properties at ambient and elevated temperatures 2. Creep and fatigue performance 3. Long term stability of properties up to 10,000 hrs 4. Corrosion performance Knowledge of these effects is essential in order to be able to specify acceptable parameter envelopes for alloy production, casting and component production. ELEKTRON WE alloy castings being used in aerospace applications today have a proven pedigree, which has resulted from an extensive optimisation programme. This has also resulted in a relatively complex and expensive alloy. There is a strong desire to significantly reduce this cost, e.g. by simplification of the alloy, or use of lower cost input materials. These areas are being investigated, but are of necessity longer term because of the need to check the effect of even relatively minor changes on all aspects of the performance envelope to maintain user confidence.
机译：在过去的20年中，在要求更高的航空航天应用中保持使用高性能镁合金的最重要因素是，镁电子公司开发了镁-钇-稀土-锆合金系统中的合金。这些合金在环境温度机械性能，短期和长期高温性能以及耐腐蚀性方面都代表了以前可用的镁合金的重大进步。 ELEKTRON WE54（Mg-5％Y-4％复合RE-Zr）和ELEKTRON WE43（Mg-4％Y-3％复合RE-Zr）的两种合金已经商业化，尤其是ELEKTRON WE43在新型航空航天应用中得到了广泛应用，特别是用于直升机传动部件和航空发动机变速箱及相关应用。按照常规的商业镁合金标准，ELEKTRON WE合金是相对复杂的系统。除钇和锆外，它们还包含稀土元素的复杂混合物，它们分别对合金的最终性能和性能具有特定的影响。在合金的开发过程中，已经研究了各个元素的特殊作用，并优化了成分以满足关键航空航天组件的苛刻要求。在特定航空部件的设计和开发阶段，已经获得了对这些影响的进一步了解。 ELEKTRON WE合金用于完全热处理（T6）条件。同样，成分和热处理参数之间存在相互关系，这可能会影响铸件的最终性能。在本文中，综述了成分，热处理和生产参数之间的一些关键相互作用，以及它们对以下方面的影响：1.在环境温度和高温下的拉伸性能2.蠕变和疲劳性能3.最高性能的长期稳定性10,000小时4.腐蚀性能为了能够为合金生产，铸造和零件生产指定可接受的参数范围，必须了解这些影响。如今，用于航空航天领域的ELEKTRON WE合金铸件具有经过验证的血统，这是通过广泛的优化计划得出的。这也导致了相对复杂和昂贵的合金。强烈希望大幅降低该成本，例如通过简化合金或使用成本较低的输入材料。这些领域正在研究中，但由于需要检查即使相对较小的更改对性能范围各个方面的影响，也需要长期使用，以保持用户的信心。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号