Published 04/10/2025 at 867 × 415 in The Effect of Microstructural Features, Defects and Surface Quality on the Fatigue Performance in Al-Si-Mg Cast Alloys Figure 5. a) Impurity-induced twinning [97]; b) restricted TPRE growth [98]. Figure 5. a) Impurity-induced twinning [97]; b) restricted TPRE growth [98].