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Mapping complex microstructures in powder metallurgy steels

New methods of characterising multiple phase powder metallurgy steels have been investigated. Mapping of microhardness with a lateral resolution of as little as 5 μm and with up to 10 4 indents can produce distributions of mechanical properties which are characteristic of different steel grades. Map... Full description

Journal Title: Powder Metallurgy 01 September 2010, Vol.53(3), pp.191-200
Main Author: Mingard, K. P
Other Authors: Roebuck, B
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Taylor & Francis (Taylor & Francis Group)
ID: ISSN: 0032-5899 ; E-ISSN: 1743-2901 ; DOI: 10.1179/003258909X12562832680759
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recordid: informaworld_s10_1179_003258909X12562832680759
title: Mapping complex microstructures in powder metallurgy steels
format: Article
creator:
  • Mingard, K. P
  • Roebuck, B
subjects:
  • Microstructure
  • Microhardness
  • Ebsd
  • Powder Metallurgy Steels
  • Engineering
ispartof: Powder Metallurgy, 01 September 2010, Vol.53(3), pp.191-200
description: New methods of characterising multiple phase powder metallurgy steels have been investigated. Mapping of microhardness with a lateral resolution of as little as 5 μm and with up to 10 4 indents can produce distributions of mechanical properties which are characteristic of different steel grades. Maps of these properties can be correlated with the different phases observed in etched microstructures, and quantification of size and interconnectivity of the regions with, for example, different hardness or stiffness is then possible. Electron backscatter diffraction can also produce simultaneously highly detailed maps of the different phases in a powder metallurgy steel with chemical composition information. Percentages of the different phases present can be determined from the crystallography and morphology of the grains observed, but the technique is limited by the speed with which maps can be acquired.
language: eng
source: Taylor & Francis (Taylor & Francis Group)
identifier: ISSN: 0032-5899 ; E-ISSN: 1743-2901 ; DOI: 10.1179/003258909X12562832680759
fulltext: fulltext
issn:
  • 0032-5899
  • 00325899
  • 1743-2901
  • 17432901
url: Link


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subjectMicrostructure ; Microhardness ; Ebsd ; Powder Metallurgy Steels ; Engineering
descriptionNew methods of characterising multiple phase powder metallurgy steels have been investigated. Mapping of microhardness with a lateral resolution of as little as 5 μm and with up to 10 4 indents can produce distributions of mechanical properties which are characteristic of different steel grades. Maps of these properties can be correlated with the different phases observed in etched microstructures, and quantification of size and interconnectivity of the regions with, for example, different hardness or stiffness is then possible. Electron backscatter diffraction can also produce simultaneously highly detailed maps of the different phases in a powder metallurgy steel with chemical composition information. Percentages of the different phases present can be determined from the crystallography and morphology of the grains observed, but the technique is limited by the speed with which maps can be acquired.
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