Analysis of the Crystallization of AZ91 Alloy by Thermal and Derivative Analysis Method Intensively Cooled in Ceramic Shell

Journal title

Archives of Foundry Engineering




No 1

Publication authors


Innovative casting materials and technologies ; magnesium alloys ; TDA method ; micro hardness ; Hardness ; Sophia® ; HeroPremium CASTING®

Divisions of PAS

Nauki Techniczne


Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.


The work presents the test result of the influence of cooling rate on the microstructure of AZ91 alloy, Vickers micro-hardness and Brinell

hardness. Studies cooling and crystallization of AZ91 alloy was cast into the ceramic shells pre-heated to 180 ° C and then air-cooled at

ambient temperature or intensively super cooled in the liquid coolant. The TDA method was applied to record and characterize the thermal

effect resulting from the phase transformations occurring during the crystallization of AZ91 alloy. The kinetics and dynamics of the

thermal processes of crystallization of AZ91 alloy in the ceramic shells were determined. Metallographic tests were performed with the

use of an optical microscope. A comparison of these test results with the thermal effect recorded by way of the TDA method was made.

Influence of cooling rate of AZ91 on HV0, 01 micro-hardness and Brinell hardness alloy was examined.


The Katowice Branch of the Polish Academy of Sciences




Artykuły / Articles


ISSN 2299-2944