Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7975091 | Materials Science and Engineering: A | 2016 | 6 Pages |
Abstract
The variation of tensile properties of A356alloy at 20 °C~â60 °C has been investigated. the distribution of dislocation slip bands near the fracture surface was studied by scanning electron microscopy SEM. Dislocation distribution was observed by transmission electron microscope TEM. The elastic stress field near the Mg2Si phase at low temperature was analyzed by ANSYS. When the temperature is decreased from 20 °C to â60 °C, the tensile strength and yield strength of A356 alloy increase and the elongation decreases. Under the effect of cold shrink, the elastic stress produced by the alloy matrix hinders the movement of the dislocation. In low temperature environment, the edge dislocation whose excess half atom facing toward Mg2Si experiences a repulsing force. On the contrary it experiences a gravitational force.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Guanghui Ma, Rongde Li, Runxia Li,