Microstructural aspects of low cycle fatigued austenitic stainless tube and pipe steels

Leber, Hans J.; Niffenegger, Markus; Tirbonod, B.

doi:10.1016/j.matchar.2007.05.011

Cited by 34 publications

(18 citation statements)

References 10 publications

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“…Experiencing such sudden mechanical and combined thermal loadings result in failure due to thermomechanical fatigue (TMF). Most of the works available in literature are aimed at understanding the cyclic stress-strain response of both monocrystalline and polycrystalline austenitic SS materials as a function of different fatigue parameters namely temperature (isothermal), strain amplitudes, strain rate and environmental conditions [3][4][5][6][7][8][9][10][11][12][13]. Furthermore, mechanical properties of crystalline materials are a function of temperature, which means basic crystalline deformation mechanics during TMF and IF testing need not necessarily be identical.…”

Section: Introductionmentioning

confidence: 99%

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Conducting thermomechanical fatigue test in air at light water reactor relevant temperature intervals

Ramesh

Leber

Diener

et al. 2011

Journal of Nuclear Materials

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Section: Introductionmentioning

confidence: 99%

“…4.4°C) Axial: ±1% of T max (K) (i.e. ±6 K is allowable to our case)6 Dynamic temperature equilibriumWith water cooled grips, the specimen is pre-cycled for five times(Fig. 4) Water cooled grips, for the specimen heads are required 6% of thermal strain range (De therm ; i.e.…”

mentioning

confidence: 99%

Conducting thermomechanical fatigue test in air at light water reactor relevant temperature intervals

Ramesh

Leber

Diener

et al. 2011

Journal of Nuclear Materials

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“…In particular, metastable austenitic stainless steels undergo strain-induced martensitic transformation (α -martensite), in which the metastable austenite phase is transformed into the thermodynamically more stable α -martensite phase due to plastic deformation [6,7]. This strain-induced martensitic transformation enhances the work hardening of metastable austenitic stainless steels.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Evaluation of Strain-Induced Phase Transformation and Damage Accumulation in Austenitic Stainless Steel Subjected to Cyclic Loading

Kim

2017

Metals

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Strain-induced phase transformation and damage accumulation in austenitic stainless steel subjected to cyclic loading were investigated by nondestructive evaluation. The cyclic loading test was performed at various strain amplitudes at the same strain rate. The volume fraction of the strain-induced phase transformation (α -martensite) was determined by ferrite scope and magnetic coercivity measurement. The damage accumulation and microstructure of cyclic loading specimens were characterized by microstructural observation. The cyclic hardening and cyclic softening behavior are discussed in terms of the generation of strain-induced martensite phases and a dislocation substructure at each strain amplitude. The volume fraction of the strain-induced phase increased with the strain amplitude. The increase in α -martensite was evaluated by measuring the ultrasonic nonlinearity parameter. The presence of α -martensite is sufficient to distort the austenitic matrix due to an interface misfit between the austenite matrix and α -martensite, resulting in wave distortion of the longitudinal wave. From this wave distortion, super-harmonics may be generated with nucleation of the strain-induced martensite, a process that strongly depends on the strain amplitude.

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“…Several authors performed low fatigue tests of the pipeline materials, including austenitic steels or Ti and Nb stabilized steels [4][5]. Such material tests are mostly preformed on the cyclically loaded samples from the material, which do not always represents real operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Steel Branch Connections during Fatigue Loading

Sládek

Patek²,

Mičian

2017

Archives of Metallurgy and Materials

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Fatigue behavior of the branch connection made of low-alloyed steel with yield stress of 355 MPa during low-cycle bending test is investigated in the article. Numerical prediction of the stress and strain distribution are described and experimentally verified by fatigue test of the branch connection sample. Experimental verification is based on low-cycle bending testing of the steel pipes welded by manual metal arc process and loaded by external force in the appropriate distance. Stresses and displacement of the samples induced by bending moment were measured by unidirectional strain gauges and displacement transducers. Samples were loaded in different testing levels according to required stress for 2.10 6 cycles. Increase of the stress value was applied until the crack formation and growth was observed. Results showed a high agreement of numerical and experimental results of stress and displacement.

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Microstructural aspects of low cycle fatigued austenitic stainless tube and pipe steels

Cited by 34 publications

References 10 publications

Conducting thermomechanical fatigue test in air at light water reactor relevant temperature intervals

Conducting thermomechanical fatigue test in air at light water reactor relevant temperature intervals

Nondestructive Evaluation of Strain-Induced Phase Transformation and Damage Accumulation in Austenitic Stainless Steel Subjected to Cyclic Loading

Behavior of Steel Branch Connections during Fatigue Loading

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