Ambient and high temperature in situ damage evolution in nickel based IN 718 super alloy

作者：Kumar Jalaj^*; Kumar Atul; Kumar Vikas

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2011, 528(12): 4009-4013.

DOI：10.1016/j.msea.2011.01.111

• Modulus
• Damage
• IN-718

In the present work, Lemaitre's damage assessment methodology has been applied to predict evolution of damage during tensile test at ambient temperature and at 823 Kin nickel based IN 718 super alloy. The damage has been evaluated through apparent elastic modulus measurement from each unloading step during the test. Marked difference was found in damage evolution and operative damage micromechanisms at these test temperatures. Critical points have been identified on the damage evolution curves for room temperature loading condition. Based on these parameters, the damage has been predicted using Lemaitre's damage model for high temperature specimen. The damage predicted is found to be in good agreement with experimental curve.

• 出版日期2011-5-15