Stress and Composition of Carbon Stabilized Expanded Austenite on Stainless Steel

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Abstract

Low-temperature gaseous carburizing of stainless steel is associated with a colossal supersaturation of the fcc lattice with carbon, without the development of carbides. This article addresses the simultaneous determination of stress and composition profiles in layers of carbon xpanded austenite obtained by low-temperature gaseous carburizing of AISI 316. X-ray diffraction was applied for the determination of lattice spacing depth profiles by destructive depth profiling and reconstruction of the original lattice spacing profiles from the measured, diffracted intensity weighted, values. The compressive stress depth distributions correlate with the depth distribution of the strain-free lattice parameter, the latter being a measure for the depth distribution of carbon in expanded austenite. Elastically accommodated compressive stress values as high as -2.7 GPa were obtained, which exceeds the uniaxial tensile yield strength by an order of magnitude.
Original languageEnglish
JournalMetallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
Volume40A
Issue number8
Pages (from-to)1791-1798
ISSN1073-5623
DOIs
Publication statusPublished - 2009

Keywords

  • LOW-TEMPERATURE
  • SUPERSATURATION
  • Residual stress
  • Carbon
  • S-PHASE

Cite this

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title = "Stress and Composition of Carbon Stabilized Expanded Austenite on Stainless Steel",
abstract = "Low-temperature gaseous carburizing of stainless steel is associated with a colossal supersaturation of the fcc lattice with carbon, without the development of carbides. This article addresses the simultaneous determination of stress and composition profiles in layers of carbon xpanded austenite obtained by low-temperature gaseous carburizing of AISI 316. X-ray diffraction was applied for the determination of lattice spacing depth profiles by destructive depth profiling and reconstruction of the original lattice spacing profiles from the measured, diffracted intensity weighted, values. The compressive stress depth distributions correlate with the depth distribution of the strain-free lattice parameter, the latter being a measure for the depth distribution of carbon in expanded austenite. Elastically accommodated compressive stress values as high as -2.7 GPa were obtained, which exceeds the uniaxial tensile yield strength by an order of magnitude.",
keywords = "LOW-TEMPERATURE, SUPERSATURATION, Residual stress, Carbon, S-PHASE",
author = "Thomas Christiansen and Somers, {Marcel A. J.}",
year = "2009",
doi = "10.1007/s11661-008-9717-9",
language = "English",
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pages = "1791--1798",
journal = "Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science",
issn = "1073-5623",
publisher = "Springer New York",
number = "8",

}

TY - JOUR

T1 - Stress and Composition of Carbon Stabilized Expanded Austenite on Stainless Steel

AU - Christiansen, Thomas

AU - Somers, Marcel A. J.

PY - 2009

Y1 - 2009

N2 - Low-temperature gaseous carburizing of stainless steel is associated with a colossal supersaturation of the fcc lattice with carbon, without the development of carbides. This article addresses the simultaneous determination of stress and composition profiles in layers of carbon xpanded austenite obtained by low-temperature gaseous carburizing of AISI 316. X-ray diffraction was applied for the determination of lattice spacing depth profiles by destructive depth profiling and reconstruction of the original lattice spacing profiles from the measured, diffracted intensity weighted, values. The compressive stress depth distributions correlate with the depth distribution of the strain-free lattice parameter, the latter being a measure for the depth distribution of carbon in expanded austenite. Elastically accommodated compressive stress values as high as -2.7 GPa were obtained, which exceeds the uniaxial tensile yield strength by an order of magnitude.

AB - Low-temperature gaseous carburizing of stainless steel is associated with a colossal supersaturation of the fcc lattice with carbon, without the development of carbides. This article addresses the simultaneous determination of stress and composition profiles in layers of carbon xpanded austenite obtained by low-temperature gaseous carburizing of AISI 316. X-ray diffraction was applied for the determination of lattice spacing depth profiles by destructive depth profiling and reconstruction of the original lattice spacing profiles from the measured, diffracted intensity weighted, values. The compressive stress depth distributions correlate with the depth distribution of the strain-free lattice parameter, the latter being a measure for the depth distribution of carbon in expanded austenite. Elastically accommodated compressive stress values as high as -2.7 GPa were obtained, which exceeds the uniaxial tensile yield strength by an order of magnitude.

KW - LOW-TEMPERATURE

KW - SUPERSATURATION

KW - Residual stress

KW - Carbon

KW - S-PHASE

U2 - 10.1007/s11661-008-9717-9

DO - 10.1007/s11661-008-9717-9

M3 - Journal article

VL - 40A

SP - 1791

EP - 1798

JO - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science

SN - 1073-5623

IS - 8

ER -