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Showing 1 to 15 of 15 for “"grain coarsening"”.
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A Study of Solidification With a Rotating Magnetic Field
… by generalizing existing literature in grain coarsening.
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Transformation and precipitation in vanadium treated steels
… to the solubility of VC and VN in austenite, the grain coarsening characteristics of austenite, the tempering of martensite and other structures, the transformation during continuous cooling, the effect of vanadium addition and increasing nitrogen content on the thermo-mechanical processing of …
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Densification, microstructure, and mechanical properties of zirconium diboride based ultra-high temperature ceramics
… which promoted densification by minimizing grain coarsening"--Abstract, page iv.
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Quantitative Analysis of Microstructural Evolution in Polycrystalline Metal Matrix with Embedded Second Phase Particle
The ubiquitous motion of grain boundaries is responsible for determining the unique microstructural patterns and stability of polycrystalline materials. By employing the versatile multi-phase field modeling methodology, the role of inert, secondary particles on the dynamics of grain boundaries …
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Microstructure, Thermal Stability and Consolidation of Nanostructured and Ultrafine Structured Cu based Metal Matrix Composite and Alloy Powders Produced by High Energy Mechanical Milling
Ultrafine grained and/or nanostructured Cu and Cu-(2.5-10)vol.%Al2O3 composite balls/granules/powder particles were produced using two high energy mechanical milling (HEMM) routes respectively. The microstructural evolution of the as-milled Cu and Cu-Al2O3 composite balls/granules/powder particles …
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Effects of Hot Isostatic Pressing on Copper Parts Additively Manufactured via Binder Jetting
… strength and ductility with porosity in spite of grain coarsening. The strength, ductility, thermal and electrical conductivity were then compared to various physical and empirical models in the literature to develop an understanding of the process-property-performance relationship.
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High temperature cracking of nickel chromium austenitic steels.
… 2 - separations associated with relatively clean grain boundaries caused by grain boundary sliding in the solid state and they are synonymous with creep rupture. This form of cracking is referred to as ductility dip cracking because it is believed to be associated with a ductility minimum which …
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Effects of cold metal transfer welding on properties of ferritic stainless steel
… toughness, when it is welded as a result of grain coarsening in the heat affected zone. Welding equipment manufacturers are constantly incorporating new technologies and capabilities into welding equipment, to make welding easier and create better welds, which then gives that manufacturer a …
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Thermomechanical behavior of advanced manufactured heat-resistant alloys and their weldments
… iron content, reduced Al content and different grain morphology. Explosion welding (EXW) cladding was explored as a cost-effective method for molten salt pipes, using C22 and Ni201 clads on 304H and Grade 91 backers. The EXW process produced defect-free metallurgical bonds with minimal …
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Mechanical and Physical Properties in Additive Friction Stir Deposited Aluminum
… research determined that the refinement of the grain size caused by the AFSD process had little or no strengthening effect on the mechanical properties of either alloy. Instead, the as-deposited condition in both alloys were soft with good ductility due to the dissolution of the strengthening …
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Degradation modes of the top-side contacting of SiC power semiconductors
… analyses showed recrystallization and grain coarsening, which weakened the material strength. In the Cu modules, the increase in thermal resistance led to the degradation of the Ag-sinter die-attach connection. Oxidation in non-encapsulated modules promoted brittle crack formation, …
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Role of impurities, LiF, and processing on the sintering, microstructure, and optical properties of transparent polycrystalline magnesium aluminate (MgAl2O4) spinel, The
… starting powders were found to cause restricted grain size and opacity. LiF addition was found to reduce the content of some impurities by one order of magnitude, counteract absorption, and impart transparency, but also to cause grain coarsening, grain-boundary embrittlement, and scatter. Thermal …
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Self-organization in immiscible alloy systems under irradiation and severe plastic deformation
… effects on a material such as creep and grain coarsening. For severe plastic deformation processing of alloys, such as high energy milling, a large amount of energy is imparted in the form of stress, which causes dislocation motion and grain refinement. Temperatures can also vary …
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Interplay between mineral reaction and deformation via structural defects
… characterized by palisade-shaped dolomite grains growing into the magnesite and granular dolomite growing towards calcite. A model was provided for the dolomite rim growth based on the counter-diffusion of CaO and MgO. All reaction products exhibited a characteristic crystallographic …
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Zyklische Plastizität von mikro- und submikrokristallinem Nickel
Im Rahmen der vorliegenden Arbeit wurde der Einfluss der Korngröße und der Gefügestabilität auf die zyklische Plastizität von mikro- und submikrokristallinem Nickel, hergestellt durch ECAP und PED, untersucht. Zur Gefügecharakterisierung kamen verschiedene elektronenmikroskopische und …