Results 241 to 250 of about 1,628,826 (288)
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Grain refinement in undercooled nickel
Scripta Metallurgica et Materialia, 1995In this paper, the microstructures of undercooled Ni that solidified at various initial bulk undercoolings are examined in detail in order to understand the mechanism of grain refinement in metallic systems. Molten Ni contracts on solidification. In the experiment, since it was covered by molten glass flux, upon crystallization cavities had to form to ...
K.K. Leung, C.P. Chiu, H.W. Kui
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Grain Refining through Semisolid Processing
Solid State Phenomena, 2014Semisolid process can be used as grain refining method to replace conventional chemical grain refining approach. Typical semisolid slurry making techniques were introduced in the paper as potential semisolid grain refining methods. The temperature and morphology control for grain refining through semisolid process were enhanced to achieve fine particle
Ming Xu Xia, Jian Guo Li, Zhong Yun Fan
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Grain refinement mechanisms in additively manufactured nano-functionalized aluminum
, 2020Additive manufacturing (AM) is a new and promising production methodology adept at producing complex geometries, which can be optimized for lower weight and enhanced capabilities.
J. H. Martin +10 more
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Materials Science Forum, 2014
Recently significant successes have been achieved in the field of grain refinement by means of such additives as the titanium, zirconium, scandium, AlTiB and AlTiC. However, introduction of grain refining additives results to a number of negative effects. These effects can be divided into four basic groups: 1.
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Recently significant successes have been achieved in the field of grain refinement by means of such additives as the titanium, zirconium, scandium, AlTiB and AlTiC. However, introduction of grain refining additives results to a number of negative effects. These effects can be divided into four basic groups: 1.
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Grain refinement of magnesium alloys
Metallurgical and Materials Transactions A, 2005The literature on grain refinement of magnesium alloys is reviewed with regard to two broad groups of alloys: alloys that contain aluminum and alloys that do not contain aluminum. The alloys that are free of aluminum are generally very well refined by Zr master alloys.
St. John, David H. +4 more
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Nucleation and Grain Refinement
Materials Science Forum, 2010The nucleation dynamics and grain refinement during solidification are reviewed. Control of the nucleation of phases is an essential step in the manufacture of optimized materials. Development of inoculants is still based on trial-and-error. Using aluminium as an example, it is shown that there is much room for significant improvements.
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, 2020
This study focuses on the role of pyramidal 〈c + a〉 dislocations in the grain refinement mechanism in the Ti-6Al-4V alloy with an initial { 11 2 ¯ 0 } 10 1 ¯ 0 > rolling texture.
Chenglin Wang +6 more
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This study focuses on the role of pyramidal 〈c + a〉 dislocations in the grain refinement mechanism in the Ti-6Al-4V alloy with an initial { 11 2 ¯ 0 } 10 1 ¯ 0 > rolling texture.
Chenglin Wang +6 more
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JOM, 1963
The possible advantages and mechanisms of obtaining grain refinement in carbon, low-, and high-alloy steels are reviewed. The role of vibration and the addition of materials to provide heterogeneous nuclei formation and grain growth inhibition are discussed. The effect of composition on the solidification of steels is described.
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The possible advantages and mechanisms of obtaining grain refinement in carbon, low-, and high-alloy steels are reviewed. The role of vibration and the addition of materials to provide heterogeneous nuclei formation and grain growth inhibition are discussed. The effect of composition on the solidification of steels is described.
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Whole Grains, Refined Grains, and Gluten
2018What are cereal grains and “pseudograins”? Grains like wheat, corn, oats, and rice are cereal grasses, the fruit or seed of the grass family; many grains are thus referred to as “cereals.” Some plants from the broadleaf family, like amaranth, buckwheat, and quinoa, are...
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Optimisation of Grain Refinement
2016Considerable progress has been made in recent years with the optimisation of grain refinement practice. In the past this could only be done by trial and error which is time consuming and far from ideal. More recently it has been possible to study and quantify the various factors affecting grain refinement including melt nucleation level, growth ...
Rein Vainik +2 more
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