Evaluation of Microstructural Characteristics in Low-Cycle Fatigued Austenitic Stainless Steel Using X-Ray Line Profile Analysis
- 26 December 2018
- journal article
- Published by Trans Tech Publications, Ltd. in Materials Science Forum
- Vol. 941, 376-381
- https://doi.org/10.4028/www.scientific.net/msf.941.376
Abstract
X-ray line profile analysis was performed to evaluate the microstructural characteristics of low-cycle fatigued austenitic stainless steel, AISI 316. Strains were frequently applied to the specimens with three levels of the total strain ranges, 0.01, 0.02, and 0.03. The dislocation densities at the number of cycles for each strain condition were obtained by X-ray line profile analysis. In the case that the strain range was small, that is Δε = 0.01, dislocation densities were slightly increased until 53% of life time with the cycles, and then decreased. In the case that the strain ranges were 0.02 and 0.03, the dislocation densities were steeply increased during the first stage of the life time until around 10%. However, the variations after n/Nf ≃ 10% were different each other. In the case of Δε = 0.02, dislocation density did not increase significantly until the end of the life. But in the case of Δε = 0.03, the dislocation density monotonously increased until the end of the life. These tendencies agreed with the variations of stress amplitude. The relationship between dislocation density and stress amplitude could be expressed as Δσ/2 = 1.14ρ1/2 + 207 (Δσ [MPa], ρ1/2 [m−2]).This publication has 21 references indexed in Scilit:
- Detection of Fatigue Damage in Stainless Steel by EBSD Analysis (Comparison with TEM Observation)TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 2013
- Dislocation structure evolution and its effects on cyclic deformation response of AISI 316L stainless steelMaterials Science and Engineering: A, 2011
- Fatigue Damage Evaluation Using Electron Backscatter DiffractionMATERIALS TRANSACTIONS, 2011
- Effects of low-cycle fatigue on static mechanical properties, microstructures and fracture behavior of 304 stainless steelMaterials Science and Engineering: A, 2010
- Extremely low cycle fatigue tests on structural carbon steel and stainless steelJournal of Constructional Steel Research, 2010
- Quantitative evaluations for strain amplitude dependent organization of dislocation structures due to cyclic plasticity in austenitic stainless steel 316LActa Materialia, 2008
- Mechanism of dynamic strain aging and characterization of its effect on the low-cycle fatigue behavior in type 316L stainless steelJournal of Nuclear Materials, 2005
- The tensile and low-cycle fatigue behavior of cold worked 316L stainless steel: influence of dynamic strain agingInternational Journal of Fatigue, 2004
- Influence of the crystalline texture on the fatigue behavior of a 316L austenitic stainless steelMaterials Science and Engineering: A, 2000
- The determination of density and distribution of dislocations in deformed single crystals from broadened X-ray diffraction profilesphysica status solidi (a), 1970