Investigation of crack propagation in X38CrMoV5 (AISI H11) tool steel at elevated temperatures

Masood Shah (1) , Catherine Mabru (1) , Farhad Rezai-Aria (1)

1 ICA - Institut Clément Ader

A method is developed to evaluate the surface fatigue damage of hot forming tools (forging, HPDC) that undergo thermo mechanical loading and environmental attack. Crack propagation under fatigue loading in a hot work tool steel X38CrMoV5‐47HRC is investigated using SENT (single edge notched tension) specimens of 2.5*8 mm*mm section. The effect of different testing conditions has been investigated: effect of thickness (ranging from 2.5mm ‐ 0.10mm), effect of R value and effect of temperature are observed on crack propagation properties of the steel. Paris curves are established. Numerical simulation is performed by ABAQUS (R) Standard to evaluate J integral and stress intensity factor K‐I. A new crack driving force parameter is introduced. Mechanisms of crack propagation have been studied under different test conditions.

Mots clés: Fatigue; Hot work tools; Surface damage; Crack propagation

Domaines: Mécanique des matériaux [physics.class-ph]

Masood Shah, Catherine Mabru, Farhad Rezai-Aria. Investigation of crack propagation in X38CrMoV5 (AISI H11) tool steel at elevated temperatures. 10th International Fatigue Congress (FATIGUE 2010), Jun 2010, Prague, Czech Republic. pp.2045-2054, ⟨10.1016/j.proeng.2010.03.220⟩. ⟨hal-01666701⟩