Dynamic Fracture Characteristics of High-Strength Steel

被引：0

作者：

Kianicová M. ^{[1
]}

Dlouhý I. ^{[2
]}

Šandera P. ^{[3
]}

Horníková J. ^{[3
]}

Pokluda J. ^{[1
,3
]}

机构：

[1] Faculty of Special Technology, Alexander Dubcek University of Trencin, Ku kyselke 469, Trenčín

[2] Institute of Physics of Materials AS CR, Žižkova 22, Brno

[3] Faculty of Mechanical Engineering, Brno University of Technology, Technická 2, Brno

来源：

Defect and Diffusion Forum | 2023年 / 422卷

关键词：

absorbed impact energy; dynamic fracture toughness; fracture surface morphology; high-strength steel; transition range;

D O I：

10.4028/p-psqq46

中图分类号：

学科分类号：

摘要：

The absorbed impact energy KV and the dynamic fracture toughness KId of the low-alloyed steel OCHN3MFA were measured in the respective temperature ranges 〈-40, 90〉 and 〈-60, -20〉 °C. The values of impact energy in the range of 〈14.1, 21.3〉 J were obtained using Charpy V-notch samples after subtracting parasitic energies (friction in bearings, etc.). All these values corresponded to an extended transition region since the temperature -40 °C was still higher than the lower shelf impact-energy (shear lips present) and the temperature 90 °C was lower than the upper shelf (only 20% of ductile morphology). Dynamic fracture toughness was determined using Charpy V-notch samples with fatigue pre-cracks. The related KId-values were obtained in the range 〈55.8, 77.5〉 MPa.m1/2. They were found to be valid linear-elastic fracture toughness and were somewhat higher than the previously reported static KIc-values. The study revealed that OCHN3MFA steel has sufficient resistance to dynamic fracture, particularly at low temperatures. © 2023 Trans Tech Publications Ltd, Switzerland.

引用

页码：45 / 49

页数：4

共 6 条

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