Effect of Microstructure on Mechanical Properties of BA1055 Bronze Castings

Journal title

Archives of Foundry Engineering




No 2

Publication authors


Mechanical properties ; Metallography ; Ship propeller castings ; Aluminium bronze

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 article presents research results performed on aluminum bronze CuAl10Fe5Ni5 (BA1055) castings used for marine propellers.

Metallographic studies were made on light microscope and a scanning electron microscope to assess quantitatively and qualitatively the

alloy microstructure. It has been shown that the shape, size and distribution of the iron-rich κ−phase precipitates in bronze microstructure

significantly affect its mechanical properties. With an increase in the number of small κ−phase precipitates increases the tensile strength of

castings, while the presence of large globular precipitates improves ductility. Fragmentation and shape of κ−phase precipitates depends on

many factors, particularly on the chemical composition of the alloy, Fe/Ni ratio, cooling rate and casting technology.


The Katowice Branch of the Polish Academy of Sciences




Artykuły / Articles


ISSN 2299-2944