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TECHNICAL PAPERS

Cryogenic Fracture Toughness Determination of a Structural Alloy Weldment by Notch Tensile Measurement and Finite Element Analysis

[+] Author and Article Information
Y. Shindo, Y. Mano, K. Horiguchi, T. Sugo

Department of Materials Processing, Graduate School of Engineering, Tohoku University, Aoba-yama 02, Sendai 980-8579, Japan

J. Eng. Mater. Technol 123(1), 45-50 (Mar 20, 2000) (6 pages) doi:10.1115/1.1288361 History: Received December 14, 1999; Revised March 20, 2000
Copyright © 2001 by ASME
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References

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Figures

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Shape and dimension of circumferentially notched bar specimen used for notch tensile test
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Weld joint configuration and specimen locations
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Axisymmetric finite element model used in ANSYS for J-integral analysis showing one-half of the specimen depicted by Fig. 1 and details in the notch-tip region
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Experimental notch tensile load P—displacement δ curves for (a) base metal specimen NT-1 and weld specimens NT-S, NT-Q, NT-C, NT-T, NT-B tested at crosshead rate of 0.2 mm/min, and (b) base metal specimen NT-1 and weld specimens NT-S, NT-C, NT-B tested at crosshead rate of 20 mm/s
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Fracture appearance and fractograph of weld specimen NT-C tested at crosshead rate of 0.2 mm/min: (a) fracture morphology and (b) fracture surface
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Ratio of notch tensile strength to fracture toughness σNTS/JIC plotted against fracture toughness JIC for the two applied crosshead rates. Solid line is Eq. (7).
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Failure energy absorption ENT versus fracture toughness JIC for the two applied crosshead rates. Solid line is Eq. (8) and dashed line is Eq. (9).
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Comparison between prediction and experiment on load P—displacement δ curves for weld specimen NT-C tested at crosshead rate of 0.2 mm/min
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Notch tensile test-based prediction of JFEM and JRice against fracture toughness JIC for specimens tested at crosshead rate of 0.2 mm/min
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Compact tension specimen used for JIC test

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