Microstructure, mechanical properties and fractography of heat-treated manganese steel

Wei Sha; X. Geriletu; Eric A. Wilson; Savko Malinov; Zeyu Chen

Microstructure, mechanical properties and fractography of heat-treated manganese steel

Wei Sha, X. Geriletu, Eric A. Wilson, Savko Malinov, Zeyu Chen

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Abstract

A Fe-8.46%Mn-0.24%Nb-0.038%C (wt.%) manganese steel was investigated. The steel has a 100% bcc structure after heat treatment at 850°C for 1.5 h, water quenching or air cooling. Martensite interlocked microstructure consisting of fine martensite plates/needles with different spatial orientations was found. Austenite forms, in small amounts, after a 600°C reheating treatment. Scanning electron microscopy images and energy dispersive spectrometry of the fracture surfaces revealed both ductile and brittle types of failure and precipitates. Deep quenching after the heat treatments does not change the phase composition or the hardness. NbC is formed in the steel, in high number densities. It plays a role in the impact fracture process, by acting as void nucleation sites, facilitating ductile fracture with dimples appearing on the fracture surface.

Original language	English
Pages (from-to)	23-27
Journal	Microscopy and Analysis
Volume	28
Issue number	7
Publication status	Published - 12 Nov 2014

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Microstructure, mechanical properties and fractography of heat-treated manganese steel
This is the accepted version of the following article: Sha, W, Geriletu, X, Wilson, EA, Malinov, S & Chen, Z 2014, 'Microstructure, mechanical properties and fractography of heat-treated manganese steel' Microscopy and Analysis, vol 28, no. 7, pp. 23-27. , which has been published in final form at http://www.microscopy-analysis.com/magazine/issues/microstructure-mechanical-properties-and-fractography-heat-treated-manganese-steel.
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http://www.microscopy-analysis.com/magazine/issues/microstructure-mechanical-properties-and-fractography-heat-treated-manganese-steel

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title = "Microstructure, mechanical properties and fractography of heat-treated manganese steel",

abstract = "A Fe-8.46%Mn-0.24%Nb-0.038%C (wt.%) manganese steel was investigated. The steel has a 100% bcc structure after heat treatment at 850°C for 1.5 h, water quenching or air cooling. Martensite interlocked microstructure consisting of fine martensite plates/needles with different spatial orientations was found. Austenite forms, in small amounts, after a 600°C reheating treatment. Scanning electron microscopy images and energy dispersive spectrometry of the fracture surfaces revealed both ductile and brittle types of failure and precipitates. Deep quenching after the heat treatments does not change the phase composition or the hardness. NbC is formed in the steel, in high number densities. It plays a role in the impact fracture process, by acting as void nucleation sites, facilitating ductile fracture with dimples appearing on the fracture surface.",

author = "Wei Sha and X. Geriletu and Wilson, {Eric A.} and Savko Malinov and Zeyu Chen",

year = "2014",

month = nov,

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pages = "23--27",

journal = "Microscopy and Analysis",

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AU - Sha, Wei

AU - Geriletu, X.

AU - Wilson, Eric A.

AU - Malinov, Savko

AU - Chen, Zeyu

PY - 2014/11/12

Y1 - 2014/11/12

N2 - A Fe-8.46%Mn-0.24%Nb-0.038%C (wt.%) manganese steel was investigated. The steel has a 100% bcc structure after heat treatment at 850°C for 1.5 h, water quenching or air cooling. Martensite interlocked microstructure consisting of fine martensite plates/needles with different spatial orientations was found. Austenite forms, in small amounts, after a 600°C reheating treatment. Scanning electron microscopy images and energy dispersive spectrometry of the fracture surfaces revealed both ductile and brittle types of failure and precipitates. Deep quenching after the heat treatments does not change the phase composition or the hardness. NbC is formed in the steel, in high number densities. It plays a role in the impact fracture process, by acting as void nucleation sites, facilitating ductile fracture with dimples appearing on the fracture surface.

AB - A Fe-8.46%Mn-0.24%Nb-0.038%C (wt.%) manganese steel was investigated. The steel has a 100% bcc structure after heat treatment at 850°C for 1.5 h, water quenching or air cooling. Martensite interlocked microstructure consisting of fine martensite plates/needles with different spatial orientations was found. Austenite forms, in small amounts, after a 600°C reheating treatment. Scanning electron microscopy images and energy dispersive spectrometry of the fracture surfaces revealed both ductile and brittle types of failure and precipitates. Deep quenching after the heat treatments does not change the phase composition or the hardness. NbC is formed in the steel, in high number densities. It plays a role in the impact fracture process, by acting as void nucleation sites, facilitating ductile fracture with dimples appearing on the fracture surface.

M3 - Article

VL - 28

SP - 23

EP - 27

JO - Microscopy and Analysis

JF - Microscopy and Analysis

SN - 2049-4424

IS - 7

ER -

Microstructure, mechanical properties and fractography of heat-treated manganese steel

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