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ＤａｍｐｉｎｇＰｒｏｐｅｒｔｙｏｆａＮｅｗＴｙｐｅｏｆＰＭＣｓＣｏｍｐｏｓｉｔｅＨｅＤｅｐｉｎｇ（何德坪）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｊｉｎｇ... 相似文献
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By introducing a sinusoidal cylindric ripple of infinitesimal amplitude into aplanar interface when there is convection in the liquid,an expression q(ω)=(t)/δ(t)isobtained for determining the stability of planar interface.The destabilizing perturbationfrequency interval and dangerous frequency for planar interface during solidification of adilute binary alloy under the condition of a sinusoidal cylindric perturbation have been in-vestigated.In comparison with the sinusoidal planar perturbation,the results obtained aremore conformable with the actual situation. 相似文献
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Based on experimental results,this paper presents that under specificvibrational and solidifying conditions,there are several periodic layers appearing in thecrystallization of A1-3％ Mg alloy.The mechanism of the formation of periodic layer isdiscussed.Furthermore,the use of the layers to identify the solid-liquid interface and theeffect of such layers on mechanical properties of alloy have been studied. 相似文献
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ＴｈｅＤａｍｐｉｎｇＰｅｒｆｏｒｍａｎｃｅｏｆＣｅｒｔａｉｎＡｌ－ＺｎＡｌｏｙｓＨｅＤｅｐｉｎｇ（何德坪）ＳｈｉＣｈｕｎｙｉ（石纯义）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＳｏｕｔｈｅａｓｔＵｎｉｖ... 相似文献
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