利用透射电子显微术研究了7075铝合金在T6,CgS3和T73状态的微观组织,并讨论了组织结构与强度和应力腐蚀抗力(SCR)的关系.结果表明,影响合金性能的主要因素是基体析出相(MPt)的密度、尺寸和类型,在CgS3状态,MPt主要为η′过渡相,其密度约5×10~(16)/cm~3,尺寸5—7nm,合金的强度和SCR综合性能较佳.作者认为这应归因于位错绕过η′粒子的几率增大.
The microstructures of T6, CgS3 and T73 aged 7075 aluminiumalloy have been investigated using TEM and related to the yield strength and thestress-corrosion resistance (SCR) of the alloy, which were shown to be affectedmainly by the type, size and density of matrix precipitates (MPt). After aged bythe newlydeveloped CgS3 process, the majority of MPt is η' transition phase withabout 5×10~(16)/cm~3 in volume density and 5-7nm in size. The alloy subsequentlyshows an optimum combination of yield strength and SCR, which has been attributed to the increased tendency of dislocations by-passing MPt particles.
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| [3] | |
| [4] | |
| [5] |
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