Influence of Nanotwin Boundary on the Bauschinger’s Effect in Cu: A Molecular Dynamics Simulation Study

Mechanical, microstructural and in-situ neutron diffraction investigations of equi-biaxial Bauschinger effects in an interstitial-free DC06 steel

“…The difference between stage a and b for this condition is much higher than for the condition with 0.5 % maximum equi-biaxial tensile strain. Similar observations for uniaxial load cases (Härtel et al, 2019) could be attributed to elastic back stresses (Abel and Muir, 1972;Hu et al, 2017;Kostryzhev, 2009;Kostryzhev et al, 2010;Plumtree and Abdel-Raouf, 2001;Richards et al, 2011;Sleeswyk and Kemerink, 1985;Stout and Rollett, 1990;Xue et al, 2016;Zhu et al, 2013): especially pile-ups of dislocations in the vicinity of grain boundaries are sources for elastic back stresses Xue et al, 2016;Zhu et al, 2013), and incorporating these effects can considerably improve spring back prediction in crystal plasticity simulations (Kim et al, 2012). The important influence of back stresses is also highlighted by the fact that for 2 % maximum equi-biaxial tensile strain the difference in XRD results between stages a and b is more pronounced than the difference between IS and a, even though more plastic deformation (2 % vs. 0.2 %) was applied.…”

“…Different microstructural models have been developed to explain the Bauschinger effect. Most importantly (i) Masing's model, which fundamentally addresses the role of residual stresses and "hard" and "soft" regions in polycrystalline materials (Masing, 1926); (ii) extensions of Masing's approach that consider inter-and intragranular residual stresses (Allain-Bonasso et al, 2012;Feaugas, 1999;Hu et al, 2017;Muhammad et al, 2017); (iii) models focusing on the interaction of dislocations created during initial deformation with precipitates, particles or other obstacles, such as grain boundaries or forest dislocations (Brown, 1977); (iv) mechanically inspired models describing the development of elastic back stresses (Abel and Muir, 1972;Hu et al, 2017;Kostryzhev, 2009;Kostryzhev et al, 2010;Liao et al, 2017;Plumtree and Abdel-Raouf, 2001;Richards et al, 2011;Sleeswyk and Kemerink, 1985;Stout and Rollett, 1990;Xue et al, 2016;Zhu et al, 2013); as well as (v) explicit microstructural models of the formation and decomposition of substructures due to annihilation (Bate and Wilson, 1986;Copreaux et al, 1993;Härtel et al, 2017;Hasegawa et al, 1975;Johnson et al, 1990;Lewandowska, 2003;Mughrabi, 1983;Peeters et al, 2002;Rauch, 1997;Rauch and Schmitt, 1989;Schmitt and Baudelet, 1985; van Riel and van den Boogaard, 2007;Vincze et al, 2005). This wealth of scientific literature clearly indicates the complex interaction of multiple microstructural and micromechanical phenomena that contribute to Bauschinger effects.…”

Molecular Dynamics Simulation of Bauschinger Effect in Cu Nanowire with Different Crystallographic Orientation

“…The result is that the compression yield strength is smaller than the tension yield strength [55,56]. However, the Bauschinger effect is affected by many factors such as grain boundaries, twinning, interphase boundaries, and second phases [57]. Many different definitions have been used to measure the magnitude of the Bauschinger effect.…”

Attenuation of the Bauschinger effect and enhancement of tension–compression asymmetry in single crystal aluminum by temperature

“…Bauschinger effect is weaker in bicrystalline copper than in monocrystalline copper. 21 Bernal 22 et al showed that the Bauschinger effect of silver nanowires is caused by the penta-twinned structure and reversible dislocation activity. The above studies show that the microscopic mechanisms that cause the Bauschinger effect in metallic materials are mainly the reverse motion of dislocations, the change of dislocation density, and the inhomogeneous plastic deformation between grains.…”