Effect of mean stress and stress amplitude on the ratcheting behaviour of 316LN stainless steel under dynamic strain aging regime

2012 ◽  
Vol 29 (4) ◽  
pp. 351-358 ◽  
Author(s):  
Aritra Sarkar ◽  
A. Nagesha ◽  
R. Sandhya ◽  
M.D. Mathew
Keyword(s):  
Stainless Steel ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Stress Amplitude ◽  
Dynamic Strain ◽  
Mean Stress ◽  
316Ln Stainless Steel ◽  
Aging Regime

On the Dynamic Strain Aging Effects during Elevated Temperature Ratcheting of Type 316LN Stainless Steel

2013 ◽  
Vol 32 (5) ◽  
pp. 475-484 ◽  
Author(s):  
Aritra Sarkar ◽  
A. Nagesha ◽  
R. Sandhya ◽  
M.D. Mathew
Keyword(s):  
Stainless Steel ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Stress Amplitude ◽  
Dynamic Strain ◽  
Mean Stress ◽  
Aging Effects ◽  
316Ln Stainless Steel ◽  
Intermediate Temperature Range ◽  
Type 316Ln Stainless Steel

AbstractRatcheting experiments were carried out on type 316LN stainless steel (SS) at different temperatures in the range, 300–923 K using different mean stress (σm) – stress amplitude (σa) combinations. Occurrence of dynamic strain aging (DSA) in the intermediate temperature range led to an anomalous temperature dependence of ratcheting strain accumulation. While the peak DSA temperature was found to be 823 K for all mean stress-stress amplitude combinations, the temperature regime of occurrence of DSA was found to depend on the σm–σa combinations used.

Development of constitutive models for dynamic strain aging regime in Austenitic stainless steel 304

2013 ◽  
Vol 45 ◽  
pp. 616-627 ◽  
Author(s):  
Amit Kumar Gupta ◽  
Hansoge Nitin Krishnamurthy ◽  
Yashjeet Singh ◽  
Kaushik Manga Prasad ◽  
Swadesh Kumar Singh
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Constitutive Models ◽  
Dynamic Strain ◽  
Stainless Steel 304 ◽  
Aging Regime ◽  
Austenitic Stainless Steel 304

Generation of Constant Life Diagram under Elevated Temperature Ratcheting of 316LN Stainless Steel

2016 ◽  
Vol 35 (4) ◽  
pp. 361-368 ◽  
Author(s):  
Aritra Sarkar ◽  
A. Nagesha ◽  
R. Sandhya ◽  
M.D. Mathew
Keyword(s):  
Stainless Steel ◽  
Elevated Temperature ◽  
Strain Aging ◽  
Strong Influence ◽  
Stress Amplitude ◽  
Safe Zone ◽  
Dynamic Strain ◽  
Mean Stress ◽  
Cyclic Life ◽  
Plastic Domain

AbstractCombined influence of mean stress and stress amplitude on the cyclic life under elevated temperature (823–923 K) ratcheting of 316LN austenitic stainless steel is discussed. Constant life Haigh diagrams have been generated, using different combinations of stress amplitude and mean stress. In the plastic domain, the allowable stress was found to increase or decrease with mean stress depending on the temperature and combination of mean stress – stress amplitude employed. Strong influence of dynamic strain aging (DSA) was found at 823 K which affected the mode of deformation of the material in comparison with 923 K. Failure mode expressed through a fracture mechanism map was found to change from fatigue to necking depending on the test temperature as well as combinations of mean stress and stress amplitude. Occurrence of DSA at 823 K proved to be beneficial by way of extending the safe zone of operation to higherR-ratios in comparison with 923 K.

Implications of dynamic strain aging under LCF-HCF interactions in a type 316LN stainless steel

2017 ◽  
Vol 708 ◽  
pp. 91-103 ◽  
Author(s):  
Aritra Sarkar ◽  
A. Nagesha ◽  
P. Parameswaran ◽  
R. Sandhya ◽  
M. Okazaki
Keyword(s):  
Stainless Steel ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Dynamic Strain ◽  
316Ln Stainless Steel ◽  
Type 316Ln Stainless Steel
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