Hardening mechanisms in a dynamic strain aging alloy, HASTELLOY X, during isothermal and thermomechanical cyclic deformation

1992 ◽  
Vol 23 (2) ◽  
pp. 551-561 ◽  
Author(s):  
R. V. Miner ◽  
M. G. Castelli
Keyword(s):  
Dynamic Strain Aging ◽  
Cyclic Deformation ◽  
Strain Aging ◽  
Dynamic Strain ◽  
Hastelloy X ◽  
Aging Alloy ◽  
Hardening Mechanisms

Dynamic Strain Aging Induced by Cyclic Deformation in Two Magnesium Alloys

2011 ◽  
Vol 299-300 ◽  
pp. 90-93
Author(s):  
Li Jia Chen ◽  
Jia Li ◽  
Feng Li ◽  
Xin Wang
Keyword(s):  
Hysteresis Loop ◽  
Magnesium Alloys ◽  
Dynamic Strain Aging ◽  
Cyclic Deformation ◽  
Strain Aging ◽  
Solution Treatment ◽  
Control Mode ◽  
Dynamic Strain ◽  
Stress Strain ◽  
Serrated Flow

Cyclic deformation for two magnesium alloys AZ91 and AM50 with different processing status has been performed under total strain amplitude control mode and at room temperature. A serrated flow can be observed in both tensile and compressive directions of the stress-strain hysteresis loop for as-extruded AZ91 and AM50 magnesium alloys. It means that the so-called dynamic strain aging occurs during cyclic deformation. In addition, the dynamic strain aging phenomenon can also be observed in two extruded magnesium alloys subjected to aging treatment as well as the AZ91 alloy subjected to solution treatment. However, the dynamic strain aging seems not to take place in the extruded AM50 alloy subjected to solution treatment because there exists no significant serrated flow behavior in either compressive or tensile direction of the stress-strain hysteresis loop. It is suggested that the occurrence of the dynamic strain aging is associated with collective behavior of many mobile dislocations as well as interactions between solute atoms and dislocations.

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