PT Journal
AU Lustinec, J
   Ocenasek, V
TI Residual Stresses and Cracks in Forgings of Heat-treatable Aluminium Alloys
SO Manufacturing Technology Journal
PY 2019
BP 637
EP 643
VL 19
IS 4
DI 10.21062/ujep/347.2019/a/1213-2489/MT/19/4/637
DE forging; aluminium alloys; heat treatment; residual stress; crack
AB 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.
ER