Static and dynamic strain aging in a Ni(C) solid solution

1983 ◽  
Vol 76 (2) ◽  
pp. 609-614 ◽  
Author(s):  
G. H. van Haastert ◽  
A. van den Beukel
2012 ◽  
Vol 472-475 ◽  
pp. 2962-2965 ◽  
Author(s):  
Na Lin ◽  
Kai Huai Yang ◽  
Shao Feng Zeng ◽  
Wen Zhe Chen

Tensile experiment of AZ91D magnesium alloy was carried out and serrated flow was apparent throughout the deformation history. Dynamic strain aging (DSA) occurs when the AZ91D magnesium alloy treated by solid solution treatment has been deformed at a set range of strain rates (1.11×10-4 s-1 to1.67×10-3 s-1) and a certain range temperatures (248 K to 423 K). The critical plastic strain εc was observed to increase with increasing strain rates but decrease with increasing temperature. The diffusing activation energy of solute atoms during the DSA occurring in AZ91D magnesium alloy is 140.8 kJ/mol by calculating, which is correspondence match with the diffusing activation energy of Al solute atoms in Mg matrix. Therefore, the micro-mechanism of DSA in the alloy is believed that the Al atoms in solid solution gather around dislocations to form Cottrell solute atmospheres by vacant diffusion and then pin the moving dislocations.


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