The influence of silicon and aluminum alloying on the lattice parameter and stacking fault energy of austenitic steel

The influence of Si and Al on the lattice parameter and stacking fault energy (SFE) of austenitic steel was studied. X-ray diffraction indicated that 2.5wt.% Al alloying increased the austenite lattice parameter by 1.41×10−3nm, whereas 2.5wt.% Si alloying had little effect. Partial dislocation separ...

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Bibliographic Details
Published inScripta materialia Vol. 92; no. C; pp. 19 - 22
Main Authors Lehnhoff, G.R., Findley, K.O., De Cooman, B.C.
Format Journal Article
LanguageEnglish
Published United States Elsevier Ltd 01.12.2014
Elsevier
Subjects
Lattice parameter
Metastable austenitic steel
Stacking fault energy
Transmission electron microscopy (TEM)
Stacking fault energy
Lattice parameter
Metastable austenitic steel
Transmission electron microscopy (TEM)
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Summary:The influence of Si and Al on the lattice parameter and stacking fault energy (SFE) of austenitic steel was studied. X-ray diffraction indicated that 2.5wt.% Al alloying increased the austenite lattice parameter by 1.41×10−3nm, whereas 2.5wt.% Si alloying had little effect. Partial dislocation separation measurements from weak-beam dark-field images indicated that 2.5wt.% Al alloying increased the SFE by 12–17mJm−2 and 2.5wt.% Si alloying decreased the SFE by 6–7mJm−2.
Bibliography:USDOE
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.07.019