Evaluation of the Transition Properties of CSA 350WT and Modifying the DREA Instrumented Impact Testing System

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Authors
  1. KarisAllen, K.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Energy based temperature transition curves have been constructed for a CSA G40-21 350WT structural steel for several specimen geometries using the load-displacement data generated by an instrumented impact test system. Specimen geometries employed include standard pressed notched ASTM E-604 and ASTM E-604 specimens precracked to approximately 0.55 a/W with notch orientations in both the T-L, and L-T orientation. The effects of machining side grooves into the lateral specimen faces for both notch geometries has also been evaluated. A framework for adjusting material temperature transition curves has been described. The framework proposed focuses on the adjustment of the transition temperature owing to conversion of plastic strain energy in the crack tip plastic zone into heat. The results indicate that with the expection of the pressed-notched, side-grooved specimens, the data from the lower shelf (brittle) to the upper shelf (ductile) combine to generate typical transition curve morphologies. TRUNCATED

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Keywords
350WT steel;Dynamic tear;ASTM E604;DT Transition curves;Side grooved fracture specimens;Impact testing system
Report Number
DREA-CR-2002-006 — Contractor Report
Date of publication
01 Jan 2002
Number of Pages
49
DSTKIM No
CA021482
CANDIS No
518202
Format(s):
Hardcopy;Document Image stored on Optical Disk

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