TY - JOUR
T1 - Deformation from twin-boundary stresses and the role of texture
T2 - Application to fatigue
AU - Peralta, P.
AU - Llanes, L.
AU - Bassani, J.
AU - Laird, C.
N1 - Funding Information:
This work was supported by the US Department of Energy under Grant No. DE-FG02-84ER-45188 and by the Laboratory for Research on the Structure of Matter, which provided assistance with central facilities. This support is greatly appreciated. We warmly thank Dr Pedro Ponte-Castaiieda and Dr Zvi Hashin for their helpful comments.
PY - 1994/7
Y1 - 1994/7
N2 - Calculations of the elastic stresses in the region adjacent to a twin boundary (TB) subjected to uniaxial tension are carried out for different orientations of the tensile axis. It is found that the principal stresses reach a maximum when the tensile axis is a ⟨111⟩ direction and that their value strongly depends on orientation. In general, the presence of the twin tends to favour the early development of secondary and multiple slip on at least one side of the TB. For cyclic deformation at intermediate amplitudes, this result is supported by experimental findings on the role of annealing TBs in favouring persistent slip band nucleation and promoting higher local hardening rates adjacent to them. The fact that the TB “stress concentrationz” is found to vary significantly as a function of orientation suggests that, in twinned polycrystalline materials, texture is an important factor in determining the role of TBs under loading, and thus their consideration as actual grain boundaries.
AB - Calculations of the elastic stresses in the region adjacent to a twin boundary (TB) subjected to uniaxial tension are carried out for different orientations of the tensile axis. It is found that the principal stresses reach a maximum when the tensile axis is a ⟨111⟩ direction and that their value strongly depends on orientation. In general, the presence of the twin tends to favour the early development of secondary and multiple slip on at least one side of the TB. For cyclic deformation at intermediate amplitudes, this result is supported by experimental findings on the role of annealing TBs in favouring persistent slip band nucleation and promoting higher local hardening rates adjacent to them. The fact that the TB “stress concentrationz” is found to vary significantly as a function of orientation suggests that, in twinned polycrystalline materials, texture is an important factor in determining the role of TBs under loading, and thus their consideration as actual grain boundaries.
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U2 - 10.1080/01418619408242547
DO - 10.1080/01418619408242547
M3 - Article
AN - SCOPUS:84953601785
SN - 0141-8610
VL - 70
SP - 219
EP - 232
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 1
ER -