Results 31 to 40 of about 9,231 (286)
Journal of Materials Research and Technology, 2022 The contribution of geometrically necessary dislocations (GNDs) and grain boundaries (GBs) on the mechanical properties of different zones in a friction stir welded pure copper joint is unveiled. This representative and simple medium stacking fault metal
Akbar Heidarzadeh +4 more
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Scaling in Plasticity-Induced Cell-Boundary Microstructure: Fragmentation and Rotational Diffusion
, 2003 We develop a simple computational model for cell boundary evolution in plastic deformation. We study the cell boundary size distribution and cell boundary misorientation distribution that experimentally have been found to have scaling forms that are ...
A. Godfrey +17 more
core +1 more source
Evidence of austenite memory in PH 15-5 and assessment of its formation mechanism
Materials & Design, 2019 Austenite memory and subsequent spontaneous recrystallization during austenitization is stated for some types of soft martensitic stainless steels such as X4CrNiMo16-5-1 or 13Cr5Ni but have not been proposed for the commercial alloy PH15-5 until now ...
Dominik Brandl +4 more
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Metals, 2020 The mechanisms responsible for the deformation of nanocrystalline materials are not well understood although many mechanisms have been proposed. This article studies the room-temperature stress-strain relations of bulk nanocrystalline silver deformed in ...
Baoru Sun, Tongde Shen
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Strengthening a Medium-Carbon Low-Alloy Steel by Nanosized Grains: The Role of Asymmetrical Rolling
Nanomaterials, 2023 A medium-carbon low-alloy steel was prepared via the asymmetric rolling process with different ratios of upper and down roll velocities. Subsequently, the microstructure and mechanical properties were explored by using SEM, EBSD, TEM, tensile tests and ...
Youzhi Li +4 more
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Journal of Structural Geology, 2019 This study presents the first use of high-angular resolution electron backscatter diffraction (HR-EBSD) to quantitatively characterise geometrically necessary dislocations in quartz subgrain structures. HR-EBSD exploits cross-correlation of diffraction patterns to measure intragranular misorientations with precision on the order of 0.01° with well ...
Wallis, David +2 more
openaire +2 more sources
Back stress in strain hardening of carbon nanotube/aluminum composites
Materials Research Letters, 2018 As demonstrated by the loading–unloading tests and the modeling of the grain size effect and the composite effect, mainly owing to the back stress induced by CNTs, carbon nanotube/aluminum (CNT/Al) composites exhibit higher strain hardening capability ...
Run Xu +10 more
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Archives of Mechanics, 2016 In our previous paper, a simple gradient-enhancement of the classical continuum theory of plasticity of single crystals deformed by multislip has been proposed for incorporating size effects. A single internal length scale has been derived as an explicit
S. Stupkiewicz, H. Petryk
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Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source
In-situ observation of dislocation dynamics near heterostructured interfaces
Materials Research Letters, 2019 There has been a long-standing controversy on how dislocations interact with interfaces. Here we report in-situ observations that in a Cu–brass heterostructured TEM film Frank–Read sources are the primary dislocation sources. They were dynamically formed
Hao Zhou +10 more
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