Stress dependence of Hall coefficient in a nickel-base superalloy
Date of Issue2018
44TH ANNUAL REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOLUME 37
School of Mechanical and Aerospace Engineering
Rolls-Royce@NTU Corporate Lab
The paper presents the development of a non-destructive technique for selective residual stress measurement based on Hall coefficient measurements. The Hall coefficient method is anticipated to be less affected by spurious interference from microstructural changes as compared to other non-destructive techniques . A lock-in measurement method was used to measure the Hall voltage non-destructively on a 1 mm thick Nickel-base superalloy IN100 specimen with adequate precision (0.03% standard deviation) and consistency. Linear stress dependence of the Hall coefficient was observed. It is found that there is an approximately 2% change of the Hall coefficient from stress-free condition to 200MPa tensile stress. The promising experimental results indicate the possibility of exploiting this technique for non-destructive measurement of subsurface residual stresses.
AIP Conference Proceedings
© 2018 The Author(s) (Published by AIP). This paper was published in AIP Conference Proceedings and is made available as an electronic reprint (preprint) with permission of The Author(s) (Published by AIP). The published version is available at: [http://dx.doi.org/10.1063/1.5031510]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.