Influence of substitutional elements on flow stress in iron at low temperature

Chomel, P.; Cottu, J.P.

doi:10.1016/0001-6160(82)90168-7

Cited by 15 publications

(7 citation statements)

References 25 publications

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“…3(b). Its variation has been compared with that of iron from ref [6] and [7]. It can be seen that within the temperature range 273 -193 K the thermal stress lies below that of pure iron.…”

Section: A Century Of Stainless Steelsmentioning

confidence: 98%

“…Two different approaches have been adopted in order to determine the onset of athermal temperature range. In the first approach as adopted by Chomel and Cottu [6] the athermal temperature (T C ) was identified from variation of strain rate sensitivity of flow stress (λ) with temperature, at λ = 0. This provides for a rational basis of the identification of athermal temperature, as it represents the end of the transition from the low temperature to the high deformation mechanisms.…”

Section: A Century Of Stainless Steelsmentioning

confidence: 99%

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Deformation and Fracture Behavior of AISI 403 Stainless Steel for Nuclear Structural Applications

Gupta

Chakravartty

Singh

2013

AMR

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The deformation and fracture behaviour of AISI 403, a tempered martensitic stainless steel for end fitting application of Pressurised heavy water reactor is being reported. The deformation behaviour studies entailed characterisation of tensile behaviour in the temperature range 77 - 873 K for the as recieved and the fine grained Nb modified variant of AISI 403. the study of elevated tensile behaviour in the two steels has been undertaken with the purpose of characterising the strain rate - temperature domain of the occurrence of dynamic strain aging (DSA) phenomenon. In both steels, while the temperature range for the manifestations of characteristic anomalies in the tensile curve due to DSA was observed within 523 - 673K, the strain domain for the fine grained Nb modfied variety was significantly higher as comapred with the as recievied variety. The low temperature tensile tests for the as recieved AISI 403 revealed the presence of Pseudo=alloy softening in the temperature range 273 - 193 K. The effect of high DBTT of the AISI 403 steel was shown by the fracture toughness tests in the J-integral format at room temperature that displayed significant scatter in smaples with high in-plane and out of plane constraint. Smaples with lower constraint showing stable crack growth were further tested at high temperature to obtain the temperature dependence of initiation fracture toughness and propagation touhgness. Within the DSA tempertaures a sharp decline in the fracture properties were observed. A mechanistic interpretation for the manifestations of the various observed phenomena is presented.

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“…3(b). Its variation has been compared with that of iron from ref [6] and [7]. It can be seen that within the temperature range 273 -193 K the thermal stress lies below that of pure iron.…”

Section: A Century Of Stainless Steelsmentioning

confidence: 98%

Section: A Century Of Stainless Steelsmentioning

confidence: 99%

Deformation and Fracture Behavior of AISI 403 Stainless Steel for Nuclear Structural Applications

Gupta

Chakravartty

Singh

2013

AMR

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“…Microstructural investigation by TEM on fatigue specimens is performed using a PHILIPS FEI The temperature-dependence of the macroscopic stress is studied with tensile tests at temperatures from 150 up to 420 K [14], [17][18][19]. Tests are performed at constant strain rate dε/dt=5.10 -4 s -1…”

Section: Ii5 Additional Characterizationmentioning

confidence: 99%

“…Low-cycle fatigue (LCF) tests are performed at room temperature and each cycle is analyzed. Results are discussed using additional techniques such as transmission electron microscopy (TEM), X-Ray diffraction and tensile tests at different temperatures [17][18][19]. plastic strain amplitudes between  p /2 = +/-0.2 % and +/-1 %.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations of internal and effective stresses during fatigue loading of high-strength steel

Vucko

Bosch

Delafosse

2014

Materials Science and Engineering: A

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Low cycle fatigue tests are performed on a high strength tempered martensitic steel at different plastic strain amplitudes at room temperature. Internal and effective components of the flow stress are analyzed using Handfield and Dickson's method. The internal stress is affected by the plastic strain amplitude. Conversely, the evolution of the athermal component of the effective stress with the number of cycles is independent of the plastic strain amplitude. The thermal part of the effective stress increases with the plastic strain amplitude, but remains constant with plastic strain accumulation. Microstructural changes in the cyclically deformed material are investigated by means of transmission electronic mycroscopy and X-Ray characterizations. Internal and effective stress evolutions are discussed based on these observations.

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“…In fact, only one among the number of samples investigated [7] satisfies this condi-I i TiKi -+ tion. The strain-rate sensitivity a In i/ao measured [7] (see also [14]) as a function of the temperature shows clearly a great deviation from the low-temperature behaviour as temperature increases. These deviations are the greater, the higher the impurity content is.…”

Section: A-fe Doped With Nickel Atomsmentioning

confidence: 99%