论文部分内容阅读
在现代高性能飞机中,一方面利用厚壁材料经过机械切削加工制成整体结构部件,一方面利用高韧性材料进行破损容差设计。对以前飞机用的高强铝合金7075-T6厚板越发强烈要求提高短横向的性能:1)提高抗应力腐蚀性能;2)提高淬透性;3)提高断裂韧性。为了改善上述合金的抗应力腐蚀性能,研制了过时效处理T73状态,但采用这种处理却使强度指标明显下降,大约降低15～
In modern high-performance aircraft, on the one hand, the use of thick-walled material through the mechanical processing of the whole structure made of components, on the one hand the use of high-toughness material damage tolerance design. In the past, the high-strength aluminum alloy 7075-T6 slabs used in the past were more and more strongly required to improve the transverse transverse performance: 1) to improve the stress corrosion resistance; 2) to improve the hardenability; and 3) to increase the fracture toughness. In order to improve the above-mentioned alloy anti-stress corrosion resistance, developed over-aging treatment T73 state, but the use of this treatment has made the strength index decreased significantly, about 15 ~