Thermisch-mechanisches Ermüdungsverhalten der partikelverstärkten Aluminiumknetlegierung EN AW-6061-T6 und die Entwicklung von Eigenspannungen im Matrixwerkstoff unter thermisch-mechanischer Beanspruchung

Abstract

Thermisch-mechanisches Ermü dungsverhalten der partikelverstä rkten Aluminiumknetlegierung EN AW-6061-T6 und die Entwicklung von Eigenspannungen im Matrixwerkstoff unter thermisch-mechanischer Beanspruchung

Residual stress and damage development in the aluminium alloy EN AW-6061 particle reinforced with Al2O3 under thermal fatigue loading

“…The effect of thermally induced local deformation on the averaged residual stresses increases with increasing V p due to an increasing amount of deformations adaptation between particles and matrix. Increasing T max shows a similar effect in consequence of generally higher thermally induced plastic deformations [9,10,25,35,46,47]. (4) Mechanically induced, local deformation occurring inside the matrices of the MMCs near the interfaces due to different stiffness of matrix and particles and different deformation behaviour [1,49,50].…”

“…The measurements were performed at the (3 1 1) matrix diffraction peak. Furthermore, the penetration depth of the X-ray has to be considered to ensure that the purely biaxial stresses existing at the surface of the MMCs are measured [35]. Table 4 gives the resulting penetration depths in aluminium and ␣-alumina.…”