用低频内耗方法,结合简谐侧应力-超声衰减实验,详细地研究了纯Al的P_c内耗峰及其背底,对其机理提出了新的解释:P_c内耗峰是由于位错拖曳可动的点缺陷(PD_1)而引起的,而其背底内耗是由于位错从可动点缺陷PD_1脱钉(低于150K时)和从不可动的点缺陷(PD_2)脱钉(高于150K时)而引起的。
Based on a detailed Study of the internal friction peak P_c and its background in pure Al by means of torsion pendulum and harmonic bias stress experiments, a new interpretation of the interaction mechanisms between dislocations and immobile point defects and mobile defects is presented.
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