On the limits of acoustic emission detectability for twinning

• Published in: Materials letters Vol. 183; pp. 417 - 419
• Main Authors: Vinogradov, A., Vasilev, E., Seleznev, M., Máthis, K., Orlov, D., Merson, D.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.11.2016
• Subjects: Acoustic emission; Alloys; Calibration; Deformation and fracture; Engineering and Technology; Grain boundaries; Magnesium base alloys; Materials Engineering; Materialteknik; Metallurgi och metalliska material; Metallurgy and Metallic Materials; Metals and alloys; Nucleation; Quantitative evaluation; Teknik; Transient responses; Twinning; Grain boundaries; Acoustic emission; Metals and alloys; Twinning; Deformation and fracture
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2016.07.063

Using synchronized rapid video imaging and calibrated acoustic emission (AE) measurements, a direct correspondence is found between the length of emerging twin and its AE transient response during in-situ testing of Mg polycrystals. The detectability limit for twin nucleation in Mg and its alloys is evaluated to be as small as 0.3µm or even less. It is shown that the use of appropriate calibration procedures enables quantitative evaluation of the kinetics of twinning by means of an advanced AE technique. •Less than 0.3µm long twins can be detected by acoustic emission (AE) technique.•Amplitude on acoustic emission signal is proportional to the twin length.•Quantitative analysis of twinning kinetics is possible by calibrated AE technique.