Investigations on the Fracture Toughness of Electron Beam Welded Steels

Ann Christin Hesse; Thomas Nitschke-Pagel; Klaus Dilger

doi:10.4028/www.scientific.net/KEM.713.74

Paper Titles

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Determination of Fracture Mechanical Properties of Carbon Bonded Alumina Using Miniaturized Specimens
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Evaluation of Fatigue Strength of Different Thickness Laser Welded S355 Steel Sheets Considering Microstructure, Surface Conditions and Residual Stresses
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Comparative Study of Microstructure and High Temperature Low Cycle Fatigue Behaviour of Nickel Base Superalloys Inconel 713LC and MAR-M247
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Mixed Mode Failure Criterion for Random Composites Using a Finite Element Model
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 713Investigations on the Fracture Toughness of...

Investigations on the Fracture Toughness of Electron Beam Welded Steels

Abstract:

Beam welded joints made from fine grain steels show martensitic micro structure, high weld hardness and thus low toughness in the weld seams. At the same time there is a risk for these welds to have crack-like defects that cannot be detected during the production and which grow due to cyclic loading. If such structures are used in areas with low ambient temperatures, it may come to brittle failure of the component. To secure components against such failure, fracture mechanic tests were carried out on electron beam welded SE(B)-samples made from S690QL and S960QL and the J-integral was determined. In order to describe the scattering of the results in the temperature transition region the results were evaluated by means of the Master Curve concept in accordance with ASTM E 1921. Afterwards the reference temperature in the transition range, T₀, was determined and correlated with the T_27J- temperature of Charpy V-notch tests.

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Periodical:

Key Engineering Materials (Volume 713)

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74-77

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.713.74

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Online since:

September 2016

Authors:

Ann Christin Hesse*, Thomas Nitschke-Pagel, Klaus Dilger

Keywords:

Brittle Fracture, Charpy Impact Strength, Fracture Mechanic Tests, Master Curve

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