In situ characterization by synchrotron x-ray radiography of the growth dynamics of equiaxed grains in Al-10wt.%Cu alloys - Aix-Marseille Université Access content directly
Conference Papers Year : 2016

In situ characterization by synchrotron x-ray radiography of the growth dynamics of equiaxed grains in Al-10wt.%Cu alloys

Abstract

The development of dendritic equiaxed grains in thin samples is monitored by in situ and real-time x-ray radiography on Al-10wt.%Cu alloys solidified by isothermal cooling down at the European Synchrotron Radiation Facility (ESRF). In situ radiography allows direct insight into dynamical phenomena that cannot be reconstructed after growth from metallography on metallic materials. This presentation is focused on the analysis of equiaxed grain growth from the very early stages to a state where dendritic grains are no longer visibly changing, close to coherency. Characteristic parameters of primary interest for materials processing and theoretical modeling and numerical simulation are discussed. The transition of equiaxed grain envelope growth driven by primary dendrites arms to growth driven by secondary arms is analyzed. The quantitative evolution of the projected internal solid fraction and total solid fraction is compared with major analytical models. Advantages and limitations of x-ray monitoring on thin 3D-samples will be discussed.
No file

Dates and versions

hal-01452165 , version 1 (01-02-2017)

Identifiers

  • HAL Id : hal-01452165 , version 1

Cite

G. Reinhart, A. Bongo, H. Nguyen-Thi, J. Baruchel, B. Billia. In situ characterization by synchrotron x-ray radiography of the growth dynamics of equiaxed grains in Al-10wt.%Cu alloys . TMS2016 Annual Meeting, Session: Materials Research in Reduced Gravity, Feb 2016, Nashville, Tennessee, United States. ⟨hal-01452165⟩
171 View
0 Download

Share

Gmail Facebook X LinkedIn More