Results 61 to 70 of about 811,199 (195)
New grain refinement method for aluminum cast alloys without adding grain refiner.
Journal of Advanced Science, 2001 Grain refiner has conventionally been added during the casting process of grain refinement, but it has recently become a recycling problem, which calls for the efforts for development of a new grain refinement method. In this paper, a technological breakthrough has been achieved, where grain refinement was successfully completed by applying ultrasonic ...
OSAWA, Yoshiaki +2 more
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Grain refinement of AZ31 magnesium alloy by electromagnetic stirring under effect of grain-refiner
Bulletin of Materials Science, 2012 The effects of electromagnetic stirring and Al4C3 grain refiner on the grain refinement of semi-continuously cast AZ31 magnesium alloy were discussed in this investigation. The results indicate that electromagnetic stirring has an effective refining effect on the grain size of AZ31 magnesium alloy under the effect of Al4C3 grain refiner ...
S Y GAO, Q C LE, Z Q ZHANG, J Z CUI
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Grain refinement in a AlZnMgCuTi alloy by intensive melt shearing: A multi-step nucleation mechanism [PDF]
, 2011 This is a post-print version of the article. Copyright @ 2010 Elsevier B.V.Direct chill (DC) cast ingots of wrought Al alloys conventionally require the deliberate addition of a grain refiner to provide a uniform as-cast microstructure for the ...
Jarry, P +9 more
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Materials Research Express, 2020 To achieve the grain refinement of the as-cast Mg–9Al–5Ca alloy and understand the microstructure evolution during the grain refinement process, the permanent magnetic stirring(PMS) was applied to the solidification process of the alloy and the water ...
Huanming Ji
doaj +1 more source
Synergistic effects of Y and Nd on grain refinement of Mg-Y-Nd-Al alloy
Materials Research Express, 2022 In this study, the synergistic effects of Y and Nd on the grain refinement of the as-cast Mg-Y-Nd-Al alloy was investigated by varying Y and Nd contents while fixing their total content (Y + Nd) at 7%.
Lili Zhao +6 more
doaj +1 more source
MetalsThe grain refinement of high-stacking-fault-energy metals during high-pressure torsion (HPT) is governed by dislocation activity and boundary evolution.
Hui Wang +6 more
doaj +1 more source
Relational Concurrent Refinement: Timed Refinement [PDF]
, 2011 Data refinement in a state-based language such as Z is defined using a relational model in terms of the behaviour of abstract programs. Downward and upward simulation conditions form a sound and jointly complete methodology to verify relational data ...
Derrick, John +4 more
core +1 more source
Journal of Magnesium and Alloys, 2020 Two step equal channel angular pressing carried out on as cast ZE41 Mg alloy resulted in a remarkable grain refinement. As compared to grain size of 46 µm in as cast sample, refinement upto 2.5 µm was achieved after 8th pass equal channel angular ...
S. Prithivirajan +2 more
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Introducing extra operations in refinement [PDF]
, 2014 This paper reconsiders refinements which introduce actions on the concrete level which were not present at the abstract level. It considers a range of different basic refinement relations, covering the standard ones for formalisms like Event-B, Z ...
Boiten, Eerke Albert
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Journal of Materials Research and TechnologyConventional Al–Ti–B and Al–Ti–C refiners fail to refine Al–Si casting alloys with high Si content due to the well-known “Si-poisoning” effect. Developing a novel grain refiner with superior grain refinement efficiency for Al–Si casting alloys is the ...
Qiuju Zheng +3 more
doaj +1 more source