Published September 15, 2008 | Version v1
Journal article Metadata-only

On the determining role of microstructure of niobium-microalloyed steels with differences in impact toughness

Creators

  • 1. Department of Chemical Engineering, University of Louisiana at Lafayette, Lafayette, LA 70504-4130 (United States)
  • 2. Center for Structural and Functional Materials, University of Louisiana at Lafayette, LA 70504-4130 (United States)
  • 3. Nucor-Yamato Steel, P.O. Box 1228, 5929 East State Highway 18, Blytheville, AR 72316 (United States)
  • 4. Reference Metals, 1000 Old Pond Road, Bridgeville, PA 15017 (United States)

Description

The relationship between microstructure and impact toughness was investigated for niobium-microalloyed steels with similar yield strength. The nominal steel composition was similar and any variation in processing history was unintentional. The general microstructure of the investigated steel was similar and consisted of 85% polygonal ferrite and 15% pearlite. Despite these similarities, they exhibited variation in toughness and were classified as high- and low-toughness steels. Detailed microstructural investigation including stereological analysis and electron microscopy implied that toughness is strongly influenced by mean intercept length of polygonal ferrite and pearlite colony, and their distribution, interlamellar spacing, and degenerated pearlite

Availability note (English)

Available from http://dx.doi.org/10.1016/j.msea.2008.01.008

Additional details

Identifiers

DOI
10.1016/j.msea.2008.01.008;
PII
S0921-5093(08)00021-X;

Publishing Information

Journal Title
Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
Journal Volume
491
Journal Issue
1-2
Journal Page Range
p. 55-61
ISSN
0921-5093
CODEN
MSAPE3

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40025706
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ELECTRON MICROSCOPY; FERRITE; LOW ALLOY STEELS; MICROSTRUCTURE; NIOBIUM ALLOYS; PEARLITE; YIELD STRENGTH
Descriptors DEC
ALLOYS; CARBON ADDITIONS; IRON ALLOYS; IRON BASE ALLOYS; MECHANICAL PROPERTIES; MICROSCOPY; STEELS; TRANSITION ELEMENT ALLOYS

Optional Information

Copyright
Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.