Results 21 to 30 of about 1,411,746 (361)
Microstructure and refinement mechanism of Al–5Ti–1B alloys
Fenmo yejin jishu, 2022 Two kinds of Al–5Ti–1B alloys were prepared by powder mixing + hot extrusion and powder mixing + gas atomization + hot extrusion, respectively. The microstructures of the Al–5Ti–1B alloys prepared by two kinds of processes were studied, and the grain ...
LI Yang +4 more
doaj +1 more source
Journal of Magnesium and Alloys, 2021 Ultrasonic treatment (UST) applied during the solidification of pure Mg, eutectic (Mg – Zn) and peritectic (Mg – Zr) alloys was investigated in order to explore the grain refinement mechanisms.
Nagasivamuni Balasubramani +4 more
doaj
Grain Refinement of Al-5Ti-0.62C-0.2Nd Grain Refiner for Commercial Pure Aluminum and Its Effect on Mechanical Properties [PDF]
Materials Research, 2018 It is well known that the mechanical properties of commercial pure Al are influenced by size of α-Al dendrites. In the present work, Al-5Ti-0.62C-0.2Nd grain refiner was prepared by a pure molten aluminum thermal explosion reaction, and its effect on ...
Wanwu Ding +6 more
doaj +1 more source
Metals, 2017 Based on electron backscattered diffraction analysis and transmission electron microscopy observation, the mechanism of inhomogeneous grain refinement in a NiTiFe shape memory alloy (SMA) subjected to single-pass equal-channel angular extrusion (ECAE ...
Yanqiu Zhang, Shuyong Jiang
doaj +1 more source
Crystals, 2023 Despite the dozens of earlier research verifications, the contribution of shearing of molten metallic alloys during their solidification to grain formation is still ambiguous.
Mahmoud Ahmadein +3 more
doaj +1 more source
GRAIN REFINEMENT OF URANIUM BY ALLOYING [PDF]
, 1951 Binary alloys of uranium with 38 elements in the range 0.01 to 1.0 at.% were made. Three alloys havirg nominal compositions of 0.01, 0.1, and 1.0 at.% were made with most of the elements, and in addition, 12 ternary and quaternary alloys were made. The alloys were cast, rolled to 7/8-inch-diameter bars, heat treated, and examined for grain size. (auth)
Saller, H. A. +2 more
openaire +3 more sources
Refined Vision-Language Modeling for Fine-grained Multi-modal Pre-training [PDF]
arXiv, 2023 Fine-grained supervision based on object annotations has been widely used for vision and language pre-training (VLP). However, in real-world application scenarios, aligned multi-modal data is usually in the image-caption format, which only provides coarse-grained supervision.
arxiv
Materials & Design, 2022 Grain refinement plays a central role in powder bed fusion (PBF) additive manufacturing by preventing hot cracking and thus enabling the development of high-strength alloys.
Freddy Leijon +5 more
doaj
Thermomechanical Grain Refinement in AA6082-T6 Thin Plates under Bobbin Friction Stir Welding
Metals, 2018 Bobbin friction stir welding (BFSW), with its fully penetrated pin and double-sided shoulder, can provide high rates of heat generation. This produces solid-state thermo-mechanical grain refinement.
Abbas Tamadon +3 more
doaj +1 more source
A simple and efficient model for mesoscale solidification simulation of globular grain structures [PDF]
Acta Materialia, Volume 55, Issue 5, March 2007, Pages 1703-1710, 2007 A simple model for the solidification of globular grains in metallic alloys is presented. Based on the Voronoi diagram of the nuclei centers, it accounts for the curvature of the grains near triple junctions. The predictions of this model are close to those of more refined approaches such as the phase field method, but with a computation cost decreased
arxiv +1 more source