摘要
利用低频内耗和示差扫描量热计（ＤＳＣ）等技术研究了共析成分Ｚｎ－Ａｌ合金共析转变过程中的能量耗散问题，发现相变潜热和热滞均与相变的路径有关。相变内耗峰的峰高与频率倒数之间呈非线性关系，而对数减缩量与频率例数之间呈线性关系。证明了共析转变过程的内耗不仅具有滞弹性的性质，而且具有线性粘弹性的性质，相变内耗峰主要是线性粘弹性内耗的贡献。用Ｍａｘｗｅｌ模型对实验结果进行了解释。
The behavior of dissipated energy in frist order phase transiton of Zn Al entectoid alloy has been investigated with the low frequency internal fricition and differential scanning calorimetry (DSC) measurements and it was found that both the latent heat and hysteresis of the phase transition depend on the transverse path.There exists a non linear relationship between the height of transformation internal friction peak and the reciprocal of frequency.1/f,while the logarithmic decrement Е??is proporational to 1/f.The transformation internal friciton is mainly due to the viscoelasticity of phase boundary.The result came from Maxwell model is agreeable to the experimental result.
出处
《材料科学与工程》
CSCD
1998年第3期17-21,共5页
Materials Science and Engineering
