Results 21 to 30 of about 5,655,416 (266)
Journal of Materials Research and Technology, 2023 It is urgent to explore an efficient treatment strategy to obtain characteristic microstructures for better mechanical properties of alloys in an era of energy shortage.
Yafei Wang +3 more
doaj +1 more source
Viewpoint: experimental recovery of geometrically necessary dislocation density in polycrystals
Scripta Materialia, 2003 Abstract Application of electron backscattering diffraction methods to recover estimates of the geometrically necessary dislocation density is described. The limitations of the method arising from the opacity of crystalline materials and the spatial and angular resolution limits are discussed.
B.S El-Dasher, B.L Adams, A.D Rollett
openaire +2 more sources
Geometrically necessary dislocation density distributions in Ti–6Al–4V deformed in tension
Acta Materialia, 2011 Abstract We have used cross-correlation-based analysis of electron backscatter diffraction patterns to map lattice rotations in polycrystalline samples of Ti–6Al–4V before and after moderate (6%) tensile deformation. The sensitivity is improved compared to conventional Hough-based indexing and allows the density of geometrically necessary ...
Littlewood, P, Britton, T, Wilkinson, A
openaire +1 more source
Resolving geometrically necessary dislocation density onto individual dislocation types using EBSD-based continuum dislocation microscopy [PDF]
International Journal of Plasticity, 2016 Abstract Modeling of plasticity is often hampered by the difficulty in accurately characterizing dislocation density on the microscale for real samples. It is particularly difficult to resolve measured dislocation content onto individual dislocation types at the length scales most commonly of interest in plasticity studies.
T.J. Ruggles, D.T. Fullwood, J.W. Kysar
openaire +1 more source
Modelling evolution of anisotropy in metals using crystal plasticity [PDF]
, 2013 Many metals used in modern engineering exhibit anisotropy. A common assumption when modelling anisotropic metals is that the level of anisotropy is fixed throughout the calculation. As it is well understood that processes such as cold rolling, forging
Chaloupka, Ondrej
core +7 more sources
Materials Research Letters, 2019 This paper reports on a heterogeneous-structured β-Ti alloy with an exceptional combination of high strength and ductility, resulting from optimized hierarchical features in a lamellar microstructure.
Sumin Shin +3 more
doaj +1 more source
Gradients of Strain to Increase Strength and Ductility of Magnesium Alloys
Metals, 2019 A strain gradient was produced in an AZ31B magnesium alloy through a plastic deformation of pure torsion at a torsional speed of π/2 per second. Compared with the base material and with the alloy processed by conventional severe plastic deformation,
Yao Liu, Songlin Cai
doaj +1 more source
Multiscale Modeling of Microcrystalline Materials [PDF]
, 2011 Materials with micrometer dimensions and their distinct mechanical properties have generated a great interest in the material science community over the last couple of decades. There is strong experimental evidence showing that microcrystalline materials
Hurtado Sepulveda , Daniel Esteban
core +1 more source
Scientific Reports, 2022 Al–Mg alloys undergo sensitization when exposed to elevated temperatures, making them susceptible to intergranular corrosion and stress corrosion cracking. Most of the existing research on microstructure effects on sensitization is centered on the effect
Jahnavi Desai Choundraj, Josh Kacher
doaj +1 more source
Length-scale effect due to periodic variation of geometrically necessary dislocation densities
International Journal of Plasticity, 2013 Abstract Strain gradient plasticity theories have been successful in predicting qualitative aspects of the length scale effect, most notably the increase in yield strength and hardness as the size of the deforming volume decreases. However new experimental methodologies enabled by recent developments of high spatial resolution diffraction methods in ...
Oeztop, Muin S. +2 more
openaire +2 more sources