Investigation on the Hole-producing Techniques of Residual-stress Measurement by Incremental Hole-drilling Method in Injection Molded Part

2018 ◽  
Vol 19 (8) ◽  
pp. 1776-1780 ◽  
Author(s):  
Chai Hwan Kim
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Residual Stress Measurement ◽  
Hole Drilling ◽  
Hole Drilling Method ◽  
Molded Part ◽  
Incremental Hole Drilling ◽  
Drilling Method ◽  
Injection Molded

Potentialities of Ultrasonics for Evaluating Residual Stresses: Influence of Microstructure

2002 ◽  
Vol 124 (3) ◽  
pp. 349-353 ◽  
Author(s):  
H. Walaszek ◽  
H. P. Lieurade ◽  
C. Peyrac ◽  
J. Hoblos ◽  
J. Rivenez
Keyword(s):  
Residual Stress ◽  
Stress Measurement ◽  
Ultrasonic Method ◽  
Thermal Relaxation ◽  
Good Control ◽  
Hole Drilling ◽  
Hole Drilling Method ◽  
Incremental Hole Drilling ◽  
Drilling Method ◽  
Ultrasonic Measurements

The good control of residual stress level in mechanical components is an important factor, particularly for a good fatigue strength of these components. This paper presents advances obtained at the technical center for mechanical engineering industries (CETIM) in the field of development of an ultrasonic method for stress measurements. This method is potentially advantageous because it is nondestructive, has good portability, and is easy to use. In the paper are discussed the results obtained with ultrasonics on steel welded plate, and a comparison is made with stress measurement obtained by incremental hole-drilling method, and X-ray diffraction. These results are also validated by thermal relaxation of the plates. The paper discusses also the microstructure influence on ultrasonic measurements and methods for adjusting the ultrasonic measurements to improve the agreement with results obtained from other techniques. In conclusion is emphasized the interest for studying the ability of the ultrasonic residual stress measurement method in different industrial cases.

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