These precipitation - hardened aluminum alloys gain their high strengths through heat treatment involving a severe quenching operation , which introduces a very high level of residual stresses 這些鋁合金為獲得高強(qiáng)度,必須進(jìn)行固溶與時效處理,其中在淬火過程中會產(chǎn)生很大的殘余應(yīng)力。