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- W1993225535 abstract "The Bauschinger effect was measured by tension-compression tests for single crystals of Al-1.2%Si and Al-0.6% Si alloys containing silicon particles to estimate the contribution of mean internal stress due to Orowan loops to the work-hardening.The crystals aged to contain silicon particles showed a pronounced Bauschinger effect. The reverse flow curves (compression) after tension showed in general an initial region of rapid work-hardening, subsequently a region of nearly linear and low work-hardening and finally a region of a parabolic work-hardening, as seen in Cu–Al2O3 alloy. However, when the crystals with small particles (2Rlesssim30 nm) were deformed by a small amount of strain in pre-straining, the reverse stress-strain curve showed a sharp convex curvature in the region of rapid work-hardening, which was associated with the inhomogeneous deformation in pre-straining by a small amount of strain.The mean internal stress estimated from the Bauschinger effect increased initially with pre-strain, in reasonable agreement with the theoretical mean internal stress due to Orowan loops until a critical strain, εc, and then appeared to saturate with increasing pre-strain. This explained the most part of work-hardening in a region of strains below a critical strain, εs. With increasing pre-strain above the εs, the contribution of forest hardening became progressively important.The εc and εs, which were considered a measure of critical strain for the plastic relaxation and for the forest hardening respectively, increased with decreasing mean particle size. In a range of large particle size (2Rgtrsim30 nm), εc=3b⁄R (b: Burgers vector, R: mean particle radius). As the particle radius became smaller than 30 nm, the εc, appeared to approach a limit of about 0.06. Such particle size dependence of the εc was discussed in terms of the plastic relaxation due to the secondary dislocation generation as well as due to cross-slip of Orowan loops." @default.
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- W1993225535 date "1979-01-01" @default.
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- W1993225535 title "The Bauschinger Effect and Work-Hardening in Aluminium Single Crystals Dispersion-Hardened with Silicon Particles" @default.
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- W1993225535 doi "https://doi.org/10.2320/matertrans1960.20.126" @default.
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