Influence of alloying elements on the strain rate and temperature dependence of the flow stress of steels

2000 ◽  
Vol 31 (13) ◽  
pp. 825-830 ◽  
Author(s):  
V. Schulze ◽  
O. Vohringer
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Temperature Dependence ◽  
Alloying Elements

Strain Rate Dependence of the Flow Stress and Work-Hardening of Single Crystals of NI3(Al,Hf)B

1994 ◽  
Vol 364 ◽  
Author(s):  
S. S. Ezz ◽  
Y. Q. Sun ◽  
P. B. Hirsch
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Yield Stress ◽  
Strain Rate Sensitivity ◽  
Work Hardening ◽  
Room Temperature ◽  
Rate Sensitivity ◽  
Controlling Mechanism

AbstractThe strain rate sensitivity ß of the flow stress τ is associated with workhardening and β=(δτ/δln ε) is proportional to the workhardening increment τh = τ - τy, where τy is the strain rate independent yield stress. The temperature dependence of β/τh reflects changes in the rate controlling mechanism. At intermediate and high temperatures, the hardening correlates with the density of [101] dislocations on (010). The nature of the local obstacles at room temperature is not established.

Effect of Strain Rate on the Plastic Behaviour of Ll2 Compounds Based on Ni3Al

1988 ◽  
Vol 133 ◽  
Author(s):  
Seiji Miura ◽  
Shouichi Ochiai ◽  
Yoshihiro Oya ◽  
Yoshinao Mishima ◽  
Tomoo Suzuki
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Temperature Dependence ◽  
Rate Sensitivity ◽  
Grain Boundary Sliding ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Positive Temperature ◽  
Fine Grain ◽  
Positive Temperature Dependence

ABSTRACTIn both single and polycrystalline Ni3Al, no strain rate dependence of 0.2% flow stress is observed in a temperature range where anomalous positive temperature dependence of strength is exhibited. A distinct strain rate dependence is observed, however, in single crystals when the test temperature is raised beyond the peak in flow stress. It is shown that (111) type slip involving diffusional process is responsible for the strain rate sensitivity at near [001] orientation, while (001) type slip which is governed by the Peierls mechanism at orientations away from [001]. In polycrystalline compound with a fine grain size an apparent loss of the positive temperature dependence of strength is observed at a slower strain rate due to grain boundary sliding.

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