Work

Investigation of the Portevin-Le Chatelier effect in metals under additional vibration impact by using the DIC-technique and the IR-analysis

Year: 2019

Type: article

Abstract: In the present work, the deformation processes and local heating were analyzed by the digital image correlation technique and the infrared thermography accordingly to characterize the spatial-time inhomogeneity associated with the Chernov-Lüders behavior and the Portevin-Le Chatelier (PLC) effect in metals. To estimate the influence of the additional vibration impact on the serrated flow, the set of flat dog-bone specimens and thin-walled cylindrical specimens were deformed in tension with a biaxial servo-hydraulic testing system Instron 8850 and with additional vibration impact provided with a tensile load and a frequency of 4 Hz with a sinusoidal waveform. The results show the influence of additional cyclic loading on the spatial-time inhomogeneity of the plastic flow in metals, it is reduced the quasi-periodic character of the plastic flow.

Source: Procedia Structural Integrity

DOI: 10.1016/j.prostr.2019.08.233

Authors: Tatyana Tretyakova, Valery Wildemann, Mikhail Tretyakov

Institution: Perm National Research Polytechnic University

Language: English

Topic: Microstructure and mechanical properties

Subfield: Metals and Alloys

Field: Materials Science

Domain: Physical Sciences

Open Access status: diamond

Funders: Russian Science Foundation, Escuela Politécnica Nacional

Awards: G3971248671, G945183176