Crack growth behavior of low-alloy bainitic 51CrV4 steel

H. G. Lambers; B. Gorny; S. Tschumak; H. J. Maier; D. Canadinc

doi:10.1016/j.proeng.2010.03.149

Crack growth behavior of low-alloy bainitic 51CrV4 steel

H. G. Lambers, B. Gorny, S. Tschumak, H. J. Maier, D. Canadinc

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Abstract

The crack growth behavior of low-alloy bainitic 51CrV4 steel was investigated. The current results indicate that the stress state present during the isothermal bainitic transformation has a strong influence on the crack propagation behavior in the near threshold regime, when the crack growth direction is perpendicular to the loading axis of the original sample undergoing phase transformation. However, the influence of stresses superimposed during the bainitic transformation on the crack growth behavior vanishes when the stress ratio is reduced from R=0.5 to R=0.1. Microstructural investigations revealed a locally pinned crack, indicating that the crack growth behavior in the near threshold regime is also strongly dependent on the local microstructure. Overall, the current results constitute the first step towards establishing a database for understanding and modeling the crack growth behavior in final work pieces exhibiting functionally-graded microstructures.

Original language	English
Pages (from-to)	1373-1382
Number of pages	10
Journal	Procedia Engineering
Volume	2
Issue number	1
DOIs	https://doi.org/10.1016/j.proeng.2010.03.149
Publication status	Published - 29 Apr 2010

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title = "Crack growth behavior of low-alloy bainitic 51CrV4 steel",

abstract = "The crack growth behavior of low-alloy bainitic 51CrV4 steel was investigated. The current results indicate that the stress state present during the isothermal bainitic transformation has a strong influence on the crack propagation behavior in the near threshold regime, when the crack growth direction is perpendicular to the loading axis of the original sample undergoing phase transformation. However, the influence of stresses superimposed during the bainitic transformation on the crack growth behavior vanishes when the stress ratio is reduced from R=0.5 to R=0.1. Microstructural investigations revealed a locally pinned crack, indicating that the crack growth behavior in the near threshold regime is also strongly dependent on the local microstructure. Overall, the current results constitute the first step towards establishing a database for understanding and modeling the crack growth behavior in final work pieces exhibiting functionally-graded microstructures.",

keywords = "Bainitic transformation, Crack growth, Fatigue, Functionally-graded material, Microstructure, Phase transformation",

author = "Lambers, {H. G.} and B. Gorny and S. Tschumak and Maier, {H. J.} and D. Canadinc",

year = "2010",

month = apr,

day = "29",

doi = "10.1016/j.proeng.2010.03.149",

language = "English",

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TY - JOUR

T1 - Crack growth behavior of low-alloy bainitic 51CrV4 steel

AU - Lambers, H. G.

AU - Gorny, B.

AU - Tschumak, S.

AU - Maier, H. J.

AU - Canadinc, D.

PY - 2010/4/29

Y1 - 2010/4/29

N2 - The crack growth behavior of low-alloy bainitic 51CrV4 steel was investigated. The current results indicate that the stress state present during the isothermal bainitic transformation has a strong influence on the crack propagation behavior in the near threshold regime, when the crack growth direction is perpendicular to the loading axis of the original sample undergoing phase transformation. However, the influence of stresses superimposed during the bainitic transformation on the crack growth behavior vanishes when the stress ratio is reduced from R=0.5 to R=0.1. Microstructural investigations revealed a locally pinned crack, indicating that the crack growth behavior in the near threshold regime is also strongly dependent on the local microstructure. Overall, the current results constitute the first step towards establishing a database for understanding and modeling the crack growth behavior in final work pieces exhibiting functionally-graded microstructures.

AB - The crack growth behavior of low-alloy bainitic 51CrV4 steel was investigated. The current results indicate that the stress state present during the isothermal bainitic transformation has a strong influence on the crack propagation behavior in the near threshold regime, when the crack growth direction is perpendicular to the loading axis of the original sample undergoing phase transformation. However, the influence of stresses superimposed during the bainitic transformation on the crack growth behavior vanishes when the stress ratio is reduced from R=0.5 to R=0.1. Microstructural investigations revealed a locally pinned crack, indicating that the crack growth behavior in the near threshold regime is also strongly dependent on the local microstructure. Overall, the current results constitute the first step towards establishing a database for understanding and modeling the crack growth behavior in final work pieces exhibiting functionally-graded microstructures.

KW - Bainitic transformation

KW - Crack growth

KW - Fatigue

KW - Functionally-graded material

KW - Microstructure

KW - Phase transformation

U2 - 10.1016/j.proeng.2010.03.149

DO - 10.1016/j.proeng.2010.03.149

M3 - Article

AN - SCOPUS:77954119091

VL - 2

SP - 1373

EP - 1382

JO - Procedia Engineering

JF - Procedia Engineering

IS - 1

ER -

Crack growth behavior of low-alloy bainitic 51CrV4 steel

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