摘要
2650铝合金作为一种新型耐热变形铝合金，主要应用于超音速运输飞机蒙皮。它具有良好的耐热性能，在100～130℃温度范围，150MPa负荷下服役6000h，其变形量不超过0．1％。该材料在国内尚没有公开发表的文献作详细介绍。本文从蠕变及断裂行为、蠕变和热暴露对沉淀强化的影响、热驱动对材料滑移的作用和蠕变物理模型的建立等几个方面，介绍了对2650-T8材料的高温性能方面的研究进展。对耐热铝合金的研究提出了自己的看法和建议。
2650 aluminum alloy , as a new type of heat-resistant aluminum alloy,is used mainly for the fuselage skin of the future supersonic civil transport aircraft. It exhibits a high resistance to heat and a strong resistance to long- term creep. Exposed to temperatures ranging from 100 to 130 ℃ during the supersonic flying phase, the material does not deform by more than 0.1% under a 150 MPa load during the 60,000 h service life. In this paper, in terms of creep and fracture behavior, effect of thermal exposure or creep on precipitation hardening, recent development on heat resistant property of 2650-T8 aluminum alloy is introduced. At last, the views and suggestions on heat-resistant aluminum alloy research are put forward.
出处
《金属功能材料》
CAS
2009年第3期73-80,共8页
Metallic Functional Materials
关键词
2650铝合金
耐热材料
蠕变行为
热暴露
热驱动
物理模型
2650 aluminum alloy
heat resistant material
creep behavior
heat exposure
thermal activation
physics-based modeling
