Dislocation evolution in 316L stainless steel subjected to uniaxial ratchetting deformation

The effect of low cycle fatigue, ratcheting and mean stress relaxation on stress–strain response and microstructural development in a dual phase steel

“…For a constant stress amplitude of 550 MPa, increasing the mean stress increases the ratcheting strain and directional strain accumulation rate, and reduces the number of cycles to failure. Both of these results are consistent with ratcheting studies carried out on various materials [14][15][16][17][18][19][20]23,24].…”

“…However, the authors have not found extensive experimental literature on MSR and ratcheting response for DP steel. Several microstructural investigation on the ratcheting behavior of materials were reported in literatures, including: AISI316L stainless steel [12,13], carbon steel and 316L stainless steel [14,15], Ti-6Al-4V two phase alloy [16], 304LN stainless steel [17,18], recrystallized molybdenum [19] and hot-rolled AZ31B magnesium alloy [20]. Dingreville et al [21] reported the variation of microscopic ratcheting with various microstructural morphology in their crystal plasticity investigation.…”

Ratcheting in pressurized pipes and equipment: A review on affecting parameters, modelling, safety codes, and challenges

“…[18][19][20][21][22][23] Ratcheting progress over asymmetric stress cycles was found as a result of cyclic plastic strain accumulation in materials extended over distinct stages with various rates and magnitudes. [18][19][20][21][22] Kang et al 24 reported macroscopic evidences of ratchetting deformation over uniaxial loading cycles in 316L stainless steel coinciding with dislocation activities over stress cycles. Microscopic examinations have revealed that progressive deformation over these stages was associated with plastic slip, dislocation interactions, and number of active dislocations.…”

“…Of a particular example are pressurized tubes undergoing both axial and hoop ratcheting. 24,29 The presence of thermal stresses promotes viscoplastic response of materials and influences rate and magnitude of ratcheting overloading stages. Bree 16 also highlighted these directions as primary and secondary components of his ratcheting map developed back in late 1960s.…”

Modelling flow stress of AISI 316L at high strain rates

“…Plastic deformations in FCC metals are mainly attributed to dislocation slip, Kang et al (2010), but also other deformation mechanism may be involved, Meyers et al (2002). The mechanical response of materials depends on its current microstructure and its evolution, Lee & Ham (1996).…”