Failure Mechanism in The Pearlite Structure

článek ve sborníku mimo WoS a Scopus

angličtina

This article describes a change of the failure mechanism in the material of an engine, where the material structure consists of fine pearlite layers with lamellar graphite equivalent to grey cast iron. To assess the failure mechanism in the material, a fractographic analysis of the fracture areas was performed after the impact test. The range of test temperatures at which the impact test was performed on the test specimens with notch ranged from -80°C to +180°C. The occurrence of brittle fracture was detected at the low temperatures by cleavage along and over the planar layers of the lamellar graphite. The brittle fracture initiation at the higher temperatures was observed by cleavage in the basic layer of the perlite. Depending on the failure mechanism of the test specimens fracture area, critical temperatures were determined. Regression of temperature dependence of notch toughness allows very precise quantification of this decrease.

peatlite structure, grey cast iron, metallographic analysis

ZIMÁKOVÁ, J.; BINAR, T.; ŠAFL, P.; ČUDEK, P.

31. 7. 2022

Brno University of Technology

Brno

978-80-214-6088-1

Advanced Batteries Accumulators and Fuel Cells – 23rd ABAF

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212

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https://www.aba-brno.cz/download/2022-ABAF-Proceeding.pdf