Microgravity and Hypergravity Observations of Equiaxed Solidification of Al-Cu Alloys Using In Situ X-Radiography Recorded in Real-Time on Board a Parabolic Flight

Andrew G. Murphy; J. Li; Olle Janson; Antonio Verga; David J. Browne

doi:10.4028/www.scientific.net/MSF.790-791.52

Paper Titles

In Situ Particle Layer Formation in a Al-Mn-Si Ternary Eutectic Alloy: Ground Reference and Microgravity Experiments
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Phase Field Modeling of β(Ti) Solidification in Ti-45at.%Al: Columnar Dendrite Growth at Various Gravity Levels
p.34

Formation of Intermetallic Phases in AlSi7Fe1 Alloy Processed Onboard the ISS
p.40

Modelling of Al-7%wtSi-1wt%Fe Ternary Alloy: Application to Space Experiments with a Rotating Magnetic Field
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Microgravity and Hypergravity Observations of Equiaxed Solidification of Al-Cu Alloys Using In Situ X-Radiography Recorded in Real-Time on Board a Parabolic Flight
p.52

Influence of Iron Powder Addition on the Number of Primary Austenite Grains and Tensile Strength of Inoculated Cast Iron
p.59

A Numerical Study of the Influence of Pouring Technique on the As-Cast Structure of Al-Cu Ingots
p.67

Understanding Channel Segregates in Numerical Models of Alloy Solidification: A Case of Converge First and Ask Questions Later
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3D Meso-Scale Modeling of Solidification for Aluminum-Alloy Welding
p.79

HomeMaterials Science ForumMaterials Science Forum Vols. 790-791Microgravity and Hypergravity Observations of...

Microgravity and Hypergravity Observations of Equiaxed Solidification of Al-Cu Alloys Using In Situ X-Radiography Recorded in Real-Time on Board a Parabolic Flight

Abstract:

During solidification of metallic alloys, thermosolutal natural convection plays a significant role in grain nucleation, subsequent growth and morphology, as well as the formation of casting defects. In this work, an Al-5wt%Ti-1wt%B inoculated Al-20wt%Cu alloy was solidified, near-isothermally, using a Bridgman-type gradient furnace, while being monitored in real-time via in-situ X-radiography as part of a parabolic flight microgravity campaign. Each parabola consisted of a transition through 24 seconds of hypergravity (1.8 g), followed by 22 seconds of microgravity, and a then a further 24 seconds of hypergravity. Solidification was controlled such that nucleation occurred coincident with the onset of microgravity. This allowed for the effects of microgravity on equiaxed nucleation and initial growth, followed by continuing solidification in hypergravity, to be observed, as well as the effect on the semi-coherent grain structure when transitioning between the two.

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Materials Science Forum (Volumes 790-791)

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52-58

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https://doi.org/10.4028/www.scientific.net/MSF.790-791.52

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Online since:

May 2014

Authors:

Andrew G. Murphy*, J. Li, Olle Janson, Antonio Verga, David J. Browne

Keywords:

Equiaxed Growth, In Situ X-Radiography, Microgravity, Parabolic Flight, Solidification

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