Assessment of Localized Plastic Deformation during Fatigue in Polycrystalline Copper by Nonlinear Ultrasonic

Metya, Avijit Kumar and Parida, N and Bhattacharya, D K and Bandopadhyay, N R and Palit Sagar, S (2007) Assessment of Localized Plastic Deformation during Fatigue in Polycrystalline Copper by Nonlinear Ultrasonic. Metallurgical and Materials Transactions A, 38 (12). pp. 3087-3092.

[img]PDF
Restricted to NML users only. Others may use ->

426Kb

Abstract

Nonlinear ultrasonic (NLU) and conventional ultrasonic techniques have been applied to assess the localized plastic deformation in polycrystalline copper during high-cycle fatigue (HCF). The measurement parameter of NLU, i.e., the NLU parameter, β, has been calculated from the power spectrum of the filtered and amplified received signal. For conventional ultrasonic, longitudinal velocity (V l) and attenuation coefficients (α) have been determined. It has been observed that the position of maximum localized plastic deformation cannot be detected by V l and α, whereas β detects the same at the stage of 30 pct of damage corresponding to the total fatigue life of the material. The result of NLU has also been correlated with the hardness during fatigue. This work reveals the potential of NLU to assess the localized deformation during fatigue much earlier to the failure.

Item Type:Article
Official URL/DOI:http://10.1007/s11661-007-9346-8
Uncontrolled Keywords:Nonlinear ultrasonic; NLU; high-cycle fatigue
Divisions:Material Science and Technology
ID Code:91
Deposited By:Dr. A K Sahu
Deposited On:08 Oct 2009 10:08
Last Modified:17 Sep 2012 15:30
Related URLs:

Repository Staff Only: item control page