A Study on Evaluation of Residual Stresses for Rolled Aluminum Plate Using the Critically Refracted Longitudinal(LCR) Wave

J. Ocean Eng. Technol. 2001;15(3):81-86.

LCR 파를 이용한 압연 알루미늄판의 잔류응력 평가에 관한 연구

김선진,전창환

부경대학교 기계공학부,부경대학교 기계공학부

Keywords: Ultrasonic evaluation, Residual stress, Aluminum plate, Travel time, Analysis of variance

핵심용어: 초음파평가, 잔류응력, 알루미늄판, 이동시간, 분산분석

Abstract

Ultrasonic travel-times obtained with the LCR ultrasonic technique have shown an ability to distinguish among three aluminum plates. The 244$ imes$150mm thick, but differ in heat treatment. One is fully annealed, the second is quenched and then tempered, and the third is heat-treated to T651 plate, as received plate. Travel-times were obtained at four locations on each side of all plates. The data for both sides of each plate clearly are in very close agreement except location 1 of each plate. In orde;