Manufacturing Technology 2019, 19(4):637-643 | DOI: 10.21062/ujep/347.2019/a/1213-2489/MT/19/4/637

Residual Stresses and Cracks in Forgings of Heat-treatable Aluminium Alloys

Jan Luštinec1,2, Vladivoj Očenášek1
1 SVÚM a.s., Tovární 2053, 250 88 Čelákovice. Czech Republic
2 University of Chemistry and Technology Prague, Department of Metals and Corrosion Engineering, Technická 5, 166 28 Prague 6, Czech Republic

The heat treatment of the heat-treatable aluminium alloy forgings includes cooling from the solutionising temperature. After heat treatment, residual stresses remain in the forging, which are due to temperature gradients during cooling. The effect of these residual stresses on the forging properties can be significantly influenced by other technological operations, including artificial aging, machining, and surface treatments. The influence of the surrounding environment can also play an important role. Because in connection with the residual stresses after heat treatment we often encounter cracks in forgings, this paper is devoted to an overview of factors that influence cracks. The typical examples of damaged forgings are discussed and explained the circumstances that caused cracks under the influence of residual stresses.

Keywords: forging, aluminium alloys, heat treatment, residual stress, crack
Grants and funding:

Technological Agency of the Czech Republic, projects No. TA02011137 and TH03010255.

Published: August 1, 2019  Show citation

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Luštinec J, Očenášek V. Residual Stresses and Cracks in Forgings of Heat-treatable Aluminium Alloys. Manufacturing Technology. 2019;19(4):637-643. doi: 10.21062/ujep/347.2019/a/1213-2489/MT/19/4/637.
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