Effect of some consolidation parameters on the microstructure and physical properties of a PM-Ni3Al alloy

Authors

  • U. D. Hünicke Institut für Werkstoffkunde. Universidad de Rostock
  • P. Adeva Centro Nacional de Investigaciones Metalúrgicas, CSIC. Madrid
  • W. Kowalski Centro Nacional de Investigaciones Metalúrgicas, CSIC. Madrid
  • P. Acosta Centro Nacional de Investigaciones Metalúrgicas, (CSIC). Madrid
  • G. Schulz Centro Nacional de Investigaciones Metalúrgicas, (CSIC). Madrid
  • K. H. Mundt Centro Nacional de Investigaciones Metalúrgicas, (CSIC). Madrid

DOI:

https://doi.org/10.3989/revmetalm.2001.v37.i2.444

Keywords:

Ni3Al, Intermetallics, Powder metallurgy, Non-destructive tests,

Abstract


The aim of this work is to study the viability of using no-destructive techniques to study the effect of consolidation parameters in the microstructure and elastic constants of a PM Ni3Al with molybdenum additions synthesized by rapid solidification and hot isostatic pressing (HIP). Furthermore the homogeneity of the compacts and presence of pores and cracks were evaluated by X-ray. For this purpose, three capsules of the alloy consolidated by HIP at different temperatures, 900, 1100 and 1250 °C, have been studied using X-ray techniques, ultrasonic measurements and Eddy-current. Parameters such as ultrasonic velocity measurements of longitudinal and transverse waves, the ultrasonic signal attenuation for high frequency, electrical conductivity and density were determined to evaluate the physical constants Eo, Go y µo. The reflected and reverberation signals have been analysed using the Fast Fourier Transformation obtaining for both a frequency spectrum that have been interpreted as Acoustic Materials Signature functions. A lineal increase of Eo and Go with an increases of the consolidation temperature has been measured which has been related to the capsules densification condition. Similar results have been obtained by measuring the electrical conductivity of the capsules. Thus, the highest value was exhibited by the capsule hipped at 1250 °C indicating that no defects are present and therefore reaching the optimal consolidation temperature.

Downloads

Download data is not yet available.

Downloads

Published

2001-04-30

How to Cite

Hünicke, U. D., Adeva, P., Kowalski, W., Acosta, P., Schulz, G., & Mundt, K. H. (2001). Effect of some consolidation parameters on the microstructure and physical properties of a PM-Ni3Al alloy. Revista De Metalurgia, 37(2), 93–97. https://doi.org/10.3989/revmetalm.2001.v37.i2.444

Issue

Section

Articles

Most read articles by the same author(s)

1 2 > >>