Experimental analysis of plastic deformation of steel grains Comparison with polycrystal models predictions

An experimental study of the polycrystalline plasticity of austenitic stainless steel

“…It occurs as a discontinuous periodic variation in shear strain, with a wavelength of a few microns, creating micro shear bands of regular spacing separated by regions with little or no strain. This is a significantly different picture from that provided by previous DIC work such as the early work by Lineau et al, (1997) but also the more recent work of Tatschl and Kolednik, (2003), Héripré et al, (2007) and Tschopp et al, (2009). The strain heterogeneity maps obtained in aluminium by Kammers and Daly, (2013) or in duplex steel by (Tasan et al, 2014) are more similar to ours, but the slip bands here are sharper and straighter.…”

“…These measurements can be used in combination with orientation maps of the investigated region to relate plastic deformation to the microstructure and starting crystal orientation (Lineau et al, 1997), (Hoc and Rey, 2000), (Hoc et al, 2003), (Jin et al, 2008), (Schroeter and McDowell, 2003) (Héripré et al, 2007) (Marteau et al, 2012)as well as local Schmid and Taylor factors (Kammers and Daly, 2013), (Tschopp et al, 2009) (Tasan et al, 2014), (Han et al, 2013) (Walley et al, 2012) and even texture and lattice curvatures after deformation (Lineau et al, 1997) (Tatschl and Kolednik, 2003) (Zhao et al, 2008) (Zhang and Tong, 2004). However, until recently, the spatial resolution of DIC measurements has been inferior to that of EBSD measurements and therefore insufficient to relate deformation to the lattice rotation and curvature at the required sub-micron scale.…”

Modeling of deformation and rotation bands and of deformation induced grain boundaries in IF steel aggregate during large plane strain compression

“…These works were based on measures of the crystalline rotation evolution during straining (Delannay et al, 2001;Randle et al, 1996), on observations of slip traces on samples surfaces (Jago and Hansen, 1986;Rey and Zaoui, 1980), on measures of local deformation using microgrid extensometry (Doumalin, 2000;Lineau et al, 1997). They showed that grains can present different behaviors depending on their initial orientation, on their neighbours, and also on the deformation path.…”

Multiscale strain measurements of plastically deforming polycrystalline titanium: Role of deformation heterogeneities

“…), see Heggli et al (2005), or based on elastic properties, see Liu (2005) and Cho and Chasiotis (2007). Numerical studies by Drugan and Willis (1996), Gusev (1997), Lineau et al (1997) and Ren and Zheng (2004) have determined various RVE length scales for elastically deforming materials. For example, Drugan and Willis (1996) reported that the minimum RVE length scale was at most twice the reinforcement diameter for elastic composites.…”