Electronic and structural studies of grain boundary strength and fracture in L12 ordered alloys—III. On the effect of stoichiometry

1987 ◽  
Vol 35 (2) ◽  
pp. 381-391 ◽  
Author(s):  
Takayuki Takasugi ◽  
Naoya Masahashi ◽  
Osamu Izumi
Keyword(s):  
Grain Boundary ◽  
Structural Studies ◽  
Ordered Alloys ◽  
Boundary Strength

Impurity effects on grain boundary strength in structural ceramics

2001 ◽  
Vol 319-321 ◽  
pp. 24-30 ◽  
Author(s):  
Yuichi Ikuhara ◽  
Hidehiro Yoshida ◽  
Taketo Sakuma
Keyword(s):  
Grain Boundary ◽  
Structural Ceramics ◽  
Impurity Effects ◽  
Boundary Strength

Effects of interstitial impurities on the grain-boundary strength of molybdenum

1996 ◽  
Vol 74 (2) ◽  
pp. 465-476 ◽  
Author(s):  
K. Hiratsuka ◽  
K. Watanabe ◽  
I. Hashimoto ◽  
H. Yamaguchi
Keyword(s):  
Grain Boundary ◽  
Interstitial Impurities ◽  
Boundary Strength

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

2012 ◽  
Vol 710 ◽  
pp. 11-18
Author(s):  
Yoon Uk Heo ◽  
Hu Chul Lee
Keyword(s):  
Grain Boundary ◽  
Critical Role ◽  
Aging Treatment ◽  
Iron Alloys ◽  
Age Hardening ◽  
Dislocation Glide ◽  
Ti Alloys ◽  
Grain Boundary Embrittlement ◽  
Boundary Embrittlement ◽  
Boundary Strength

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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