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Title: Loading rate effects on strength and fracture toughness of pipe steels used in Task 1 of the IPIRG program

Abstract

Material characterization tests were conducted on laboratory specimens machined from pipes to determine the effect of dynamic loading (i.e., rates comparable to those for high amplitude seismic events) on tensile properties and fracture resistance at 288 C (550 F). Specimens were fabricated from seven different pipes, including carbon steels and stainless steels (both base metal and weld metal), which were to be subjected to full-scale pipe tests in IPIRG Task 1.0. For the stainless steels tested at 288 C (550 F), tensile strength was unchanged, while yield strength and fracture resistance were increased. The increase in fracture resistance was modest for the wrought base metals and substantial for the weld metal and the cast base metal. The carbon steels tested were sensitive to dynamic strain aging, and hence the strength and toughness was affected by both temperature and strain rate effects. The carbon steel base metal and welds exhibited ultimate tensile strength values at 288 C (550 F) that were greater than at room temperature. Furthermore, the ultimate tensile strength at 288 C (550 F) was lowered significantly by increased strain rate and, in the carbon steel base metals, increased strain rate also lowered the fracture resistance, substantially in themore » base metal of one pipe. In comparing these results to the IPIRG pipe test results to date, it was found that the trends of these tests agree well with the Subtask 1.2 quasi-static and dynamic pipe fracture experiments. Loads measured in the Subtask 1.1 pipe experiments were, however, somewhat higher than would have been expected by the trends observed in the laboratory tests.« less

Authors:
; ;  [1]
  1. Battelle, Columbus, OH (United States)
Publication Date:
Research Org.:
Nuclear Regulatory Commission, Washington, DC (United States). Div. of Engineering; Battelle, Columbus, OH (United States)
Sponsoring Org.:
Nuclear Regulatory Commission, Washington, DC (United States)
OSTI Identifier:
10192580
Report Number(s):
NUREG/CR-6098; BMI-2175
ON: TI94002350; CNN: Grant D2060; TRN: 93:025655
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Oct 1993
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 36 MATERIALS SCIENCE; CARBON STEELS; TENSILE PROPERTIES; FRACTURE PROPERTIES; STAINLESS STEELS; REACTORS; PIPES; YIELD STRENGTH; SEISMIC EFFECTS; TEMPERATURE RANGE 0400-1000 K; WELDED JOINTS; 220200; 360103; COMPONENTS AND ACCESSORIES; MECHANICAL PROPERTIES

Citation Formats

Marschall, C W, Landow, M P, and Wilkowski, G M. Loading rate effects on strength and fracture toughness of pipe steels used in Task 1 of the IPIRG program. United States: N. p., 1993. Web. doi:10.2172/10192580.
Marschall, C W, Landow, M P, & Wilkowski, G M. Loading rate effects on strength and fracture toughness of pipe steels used in Task 1 of the IPIRG program. United States. https://doi.org/10.2172/10192580
Marschall, C W, Landow, M P, and Wilkowski, G M. Fri . "Loading rate effects on strength and fracture toughness of pipe steels used in Task 1 of the IPIRG program". United States. https://doi.org/10.2172/10192580. https://www.osti.gov/servlets/purl/10192580.
@article{osti_10192580,
title = {Loading rate effects on strength and fracture toughness of pipe steels used in Task 1 of the IPIRG program},
author = {Marschall, C W and Landow, M P and Wilkowski, G M},
abstractNote = {Material characterization tests were conducted on laboratory specimens machined from pipes to determine the effect of dynamic loading (i.e., rates comparable to those for high amplitude seismic events) on tensile properties and fracture resistance at 288 C (550 F). Specimens were fabricated from seven different pipes, including carbon steels and stainless steels (both base metal and weld metal), which were to be subjected to full-scale pipe tests in IPIRG Task 1.0. For the stainless steels tested at 288 C (550 F), tensile strength was unchanged, while yield strength and fracture resistance were increased. The increase in fracture resistance was modest for the wrought base metals and substantial for the weld metal and the cast base metal. The carbon steels tested were sensitive to dynamic strain aging, and hence the strength and toughness was affected by both temperature and strain rate effects. The carbon steel base metal and welds exhibited ultimate tensile strength values at 288 C (550 F) that were greater than at room temperature. Furthermore, the ultimate tensile strength at 288 C (550 F) was lowered significantly by increased strain rate and, in the carbon steel base metals, increased strain rate also lowered the fracture resistance, substantially in the base metal of one pipe. In comparing these results to the IPIRG pipe test results to date, it was found that the trends of these tests agree well with the Subtask 1.2 quasi-static and dynamic pipe fracture experiments. Loads measured in the Subtask 1.1 pipe experiments were, however, somewhat higher than would have been expected by the trends observed in the laboratory tests.},
doi = {10.2172/10192580},
url = {https://www.osti.gov/biblio/10192580}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {10}
}