Paper Titles

Preface, Committees and Dedication

Cobalt and the Toughness of Steel
p.3

Grain Boundary Embrittlement and De-Embrittlement in Age Hardenable Iron Alloys
p.11

Ultrafine Grained Steel Wire and its Formability
p.19

Quantitative Non-Destructive Evaluation of Steel Microstructure Using Elastic Wave Perturbation
p.27

Rheological Behavior of Various Al Alloys during Solidification
p.35

Structure and Defect Formation during DC Casting of Aluminium Alloys
p.43

Selection and Design Principles of Wrought Aluminium Alloys for Structural Applications
p.50

Processing, Structure, Texture and Microtexture in Titanium Alloys
p.66

HomeMaterials Science ForumMaterials Science Forum Vol. 710Grain Boundary Embrittlement and De-Embrittlement...

Grain Boundary Embrittlement and De-Embrittlement in Age Hardenable Iron Alloys

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Abstract:

Grain boundary embrittlement and de-embrittlement observed in age hardening iron alloys were reviewed. Fe-Mn-Ni and Fe-Ni-Ti alloys show excellent hardening response during aging treatment. However these alloys all suffer grain boundary embrittlemnt and show no tensile ductility even after very short aging treatment. Precipitation of intermetallic phases, θ-MnNi in Fe-Mn-Ni alloys and η-Ni3Ti in Fe-Ni-Ti alloys, at grain or lath boundaries was suggested as the reason for the weakening of grain boundary strength. Grain boundary strength recovered when these precipitates transform to austenite after extended aging. Dislocation glide or dislocation climb did critical role in conversion of these grain boundary precipitates to austenite.

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Periodical:

Materials Science Forum (Volume 710)

Pages:

11-18

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.710.11

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Online since:

January 2012

Authors:

Yoon Uk Heo, Hu Chul Lee

Keywords:

Twinning, Age Hardening, Embrittlement, Fe-Mn-Ni Alloy, Grain Boundary, Precipitate

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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