ISSN:
1573-9325
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions The studies carried out were of a preliminary nature. The effect of different forms of perturbing factors caused by the electrical system, cooler, etc., made it impossible to draw any hasty conclusions or any far reaching generalizations. These factors require more accurate study and the measuring technique needs improving. However, the results obtained apparently confirm the suitability of acoustic emission for analyzing the mechanism of failure during thermal cycling. Data from the study showed the following. 1. Existence of a relationship between the amount of energy absorbed by a specimen and the intensity of AE signals. 2. The periodic nature of AE during thermal cycling probably caused by the sudden nature of deformation observed during thermal cycling. 3. Extinction of emission during the few cycles before failure. Similar indication may be observed during static tensile tests on metals, and consequently AE may be used to study and determine the failure mechanism also during thermal cycling. 4. A marked difference between AE intensity in the specimen heating and cooling periods (see Fig. 4). The AE intensity during specimen heating was an order of magnitude greater than during cooling, and this probably indicates a greater amount of damage initiated during specimen heating.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00769787
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