Effect of strain rate and temperature on the serration behavior of SA508-III RPV steel in the dynamic strain aging process

2018 ◽  
Vol 25 (7) ◽  
pp. 767-775 ◽  
Author(s):  
Xue Bai ◽  
Su-jun Wu ◽  
Li-jun Wei ◽  
Shuai Luo ◽  
Xie Xie ◽  
...  
Keyword(s):  
Strain Rate ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Aging Process ◽  
Dynamic Strain ◽  
Rpv Steel ◽  
Serration Behavior

Evaluation of activation energy for dynamic strain aging process in 316L(N)/316(N) SS weld joints

2008 ◽  
Vol 61 (4) ◽  
pp. 301-306 ◽  
Author(s):  
M. Shanmugavel ◽  
M. Nandagopal ◽  
R. Sandhya ◽  
K. Bhanu Sankara Rao ◽  
R. Gnanamoorthy
Keyword(s):  
Activation Energy ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Aging Process ◽  
Dynamic Strain ◽  
Weld Joints

scholarly journals Behavior of Dynamic Strain Aging in Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr Alloy Strip

2021 ◽  
Vol 59 (1) ◽  
pp. 8-13
Author(s):  
Il-Hyun Kim ◽  
Myung-Ho Lee ◽  
Yang-Il Jung ◽  
Hyun-Gil Kim ◽  
Jae-Il Jang
Keyword(s):  
Tensile Test ◽  
Strain Rate ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Rolling Direction ◽  
Rate Sensitivity ◽  
Dynamic Strain ◽  
Alloy Strip ◽  
Lower Strain ◽  
Temperature Ranges

The behavior of dynamic strain aging (DSA) in a Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr alloy strip was investigated at temperature ranges of 25–600 °C via a tensile test. The tensile test was performed at two different strain rates 8.33 × 10<sup>-5</sup> and 1.67 × 10<sup>-2</sup> s<sup>-1</sup>. The shear stress of the alloy strip revealed a linear dependency on the test temperature when the specimens were tested under a higher strain rate (1.67 × 10<sup>-2</sup> s<sup>-1</sup>). However, the linear relationship was broken due to DSA when the samples were deformed under a lower strain rate (8.33 × 10<sup>-5</sup> s<sup>-1</sup>). The discrepancy was most significant at 400 °C. The trend in DSA behavior was similar irrespective of the orientation of the samples, i.e., rolling direction (RD) or transverse direction (TD). However, the effect of DSA was larger in the TD samples than the RD samples. The phenomena were interpreted to the variation in work hardening exponents and strain rate sensitivity. The value of the exponent decreased from 0.14 to 0.08 along a RD and from 0.1 to 0.07 along a TD, respectively. However, the smallest value was observed at 400–500 °C irrespective of the specimen orientation, which is consistent with the DSA behavior. It is suggested that the DSA was caused by an interaction of moving dislocations with solute atoms typically oxygen.

Dynamic strain aging in DP1000: Effect of temperature and strain rate

2021 ◽  
pp. 142509
Author(s):  
Sarath Chandran ◽  
Wenqi Liu ◽  
Junhe Lian ◽  
Sebastian Münstermann ◽  
Patricia Verleysen
Keyword(s):  
Strain Rate ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Effect Of Temperature ◽  
Dynamic Strain

Effect of SPD processing on mechanical behavior and dynamic strain aging of an Al-Mg alloy in various deformation modes and wide strain rate range

2017 ◽  
Vol 696 ◽  
pp. 348-359 ◽  
Author(s):  
M.A. Valdes-Tabernero ◽  
R. Sancho-Cadenas ◽  
I. Sabirov ◽  
M.Yu Murashkin ◽  
I.A. Ovid’ko ◽  
...  
Keyword(s):  
Strain Rate ◽  
Mechanical Behavior ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Strain Rate Range ◽  
Mg Alloy ◽  
Dynamic Strain ◽  
Rate Range ◽  
Deformation Modes

Effects of Strain Rate on Dynamic Strain Aging of SA508-III Steel

2014 ◽  
Vol 788 ◽  
pp. 334-339 ◽  
Author(s):  
Dan Yuan ◽  
Lei Wang ◽  
Yang Liu ◽  
Xiu Song ◽  
Jia Hua Liu
Keyword(s):  
Strain Rate ◽  
Dynamic Strain Aging ◽  
Strain Aging ◽  
Cell Structure ◽  
Tensile Tests ◽  
Dislocation Cell ◽  
Strain Rate Range ◽  
Dynamic Strain ◽  
Strain Rates ◽  
Reduction Of Area

The dynamic strain aging (DSA) behavior of SA508-III steel was evaluated through tensile tests with different strain rates from 10-4 to 10-1s-1 at 350°C. The OM, SEM and TEM were carried out to observe the microstructures and fracture morphologies of the steel. The results show that the serrated flows appear in the stress-strain curves when the strain rate is between 10-3~10-2s-1, indicating that DSA occurs. Under the strain rate range, the tensile strength increases and the elongation and the reduction of area decrease. However, the fracture surface of the steel after tensile tests is still ductile. DSA in SA508-III steel at the strain rates from10-3 to 10-2s-1 is mainly caused by the interaction between the internal solute atoms and dislocations, which leads to the dislocations multiplication and the formation of sub-grain boundaries and dislocation cell structure.

Effects of strain rate and dynamic strain aging on work hardening of an austenitic stainless steel

1981 ◽  
Vol 15 (6) ◽  
pp. 581-584 ◽  
Author(s):  
Sergio Neves Monteiro ◽  
Iain Le May ◽  
Luiz Henrique de Almeida
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Strain Rate ◽  
Dynamic Strain Aging ◽  
Work Hardening ◽  
Strain Aging ◽  
Dynamic Strain
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