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一引言众所周知,弹性模量(E)值,主要取决于金属原子本性和晶格类型,与原子间距有密切关系,是一个对成份、组织不敏感的性能指标,因此,不同牌号的同一类合金的E值是比较稳定的常值。如铝合金国内外测定均在7000～7200kgf/mm~2。但长期以来,航空使用的铝合金板,为了防止腐蚀而包覆纯铝层(或近似纯铝层)的铝合金板的E值波动却较大,国产包铝铝板LC9合金尤为突出,同一批热处理同一规格的板材所测得的E值,均较低于基体合金,波动也较大,一般在6300～6600kgf/mm~2之间,个别在6000kgf/mm~2或低于6000kgf/mm~2,鉴于E值是零部件设计所需的一个十分重要的参数,本文对上述情况进行了一些试验研究。
I. INTRODUCTION It is well known that the elastic modulus (E) depends mainly on the atomic nature of the metal and the type of crystal lattice and is closely related to the atomic pitch. It is an index of performance insensitive to composition and organization. Therefore, The E value is a relatively stable constant. Such as the determination of aluminum alloy at 7000 ~ 7200kgf / mm ~ 2. However, for a long time, the use of aviation aluminum alloy plate, in order to prevent corrosion and coated aluminum layer (or almost pure aluminum layer) of the aluminum alloy plate E value fluctuations are larger, made of aluminum clad aluminum LC9 alloy is more prominent, the same batch Heat treatment of the same specifications of the plate measured E values are lower than the base alloy, fluctuations are larger, usually between 6300 ~ 6600kgf / mm ~ 2, individual 6000kgf / mm ~ 2 or less than 6000kgf / mm ~ In view of the E value is a very important parameter required for the design of parts, this paper carried out some experimental studies on the above situation.