On the relationship between internal porosity and the tensile ductility of aluminium alloy die-castings

Publication date: Available online 14 February 2020Source: Materials Science and Engineering: AAuthor(s): Ewan Lordan, Jaime Lazaro-Nebreda, Yijie Zhang, Kun Dou, Paul Blake, Zhongyun FanAbstractThis paper describes the application of X-ray tomography to predict the tensile fracture properties of aluminium alloy die-castings containing natural casting defects. A new estimator (Z-project) is presented that can predict the areal fraction of porosity involved during tensile failure to a higher degree of accuracy than conventional methods, which are also discussed. By coupling the proposed estimator with an existing model for the development of plastic instabilities in a deforming body, the tensile fracture strain and tensile fracture stress are predicted with much less error than previous approaches.
Source: Materials Science and Engineering: A - Category: Materials Science Source Type: research