VHCF Response of AISI H13 Steel: assessment of Size Effects through Gaussian Specimens

The paper aims at assessing the influence of the Size-Effect (SE) parameter on the VHCF response of the AISI H13 steel. Ultrasonic tests were performed on Gaussian and hourglass specimens characterized by different risk-volumes (volume of material subjected to an almost uniform stress amplitude). Experimental results showed that a significant difference exists between the VHCF strengths of the investigated material obtained by using specimens with different risk-volumes.