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On the relation between ultrasonic attenuation and fracture toughness in type 403 stainless steel

From National Research Council Canada

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Affiliation
  1. National Research Council Canada
FormatText, Article
Abstract
Previous studies have indicated the possibility of using ultrasonic attenuation as a nondestructive tool for predicting the fracture toughness of metals. In all these studies, however, the fracture toughness was varied by changing microstructure or composition. In the present paper, ultrasonic attenuation is measured in a single sample of constant microstructure (type 403 stainless steel) in which fracture toughness is changed by nearly a factor of three by varying the temperature. Results show that the frequency and temperature dependence of attenuation are in agreement with conventional grain scattering theory and do not correlate with the large changes in K₁c. It is concluded that one of the main difficulties of nondestructively characterizing fracture toughness is that a small variation in one of the material's properties, such as yield stress, can alter the fracture mechanism, leading to very rapid changes in K₁c. In most cases, the modest change in yield stress will be accompanied by similarly modest changes in attenuation, which do not reflect the rapid changes in K₁c.
Publication date
PublisherAmerican Society for Nondestructive Testing
In
  • Materials Evaluation 43: 101–104.
LanguageEnglish
Peer reviewedYes
NRC numberCNRC 23353
NRC-IGM 84-140-126
NPARC number23004824
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Record identifier83fa88f4-d01e-44e6-a518-ba52f38ac4c7
Record created2019-01-02
Record modified2020-03-17
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