Fracture Resistance in Multiphase Alloys

2007 ◽  
Vol 345-346 ◽  
pp. 611-618
Author(s):  
Kwai S. Chan
Keyword(s):  
Fracture Behavior ◽  
Volume Fraction ◽  
Ductile Phase ◽  
In Situ Composites ◽  
Deformation And Fracture ◽  
Multiphase Alloys ◽  
Solid Solution Matrix ◽  
Alloying Effects ◽  
Solution Matrix

The fracture behavior of Nb-based in-situ composites is reviewed to elucidate the effects of alloy additions on the fracture process in multiphase alloys. The overview paper summarizes the current understanding of the processes by which alloying addition and microstructure alter the near-tip deformation and fracture mechanism, and presents a methodology for predicting the fracture toughness of the constituent phases and the composite. The alloying effects observed in Nb-based in-situ composites can be attributed to changes in dislocation mobility in the metallic solid solution matrix that provides ductile phase toughening in the composites. The size, volume fraction, and the continuity of the intermetallic phases dictate the fracture path and impact significantly the facture toughness of the in-situ composites.

In situ tensile deformation and fracture behavior of Ti–24Al–14Nb–3V–0.5Mo alloy with various microstructures

2004 ◽  
Vol 12 (1) ◽  
pp. 43-53 ◽  
Author(s):  
Y. Wu ◽  
L. Zhen ◽  
D.Z. Yang ◽  
M.S. Kim ◽  
S.K. Hwang ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Tensile Deformation ◽  
Deformation And Fracture

In-Situ Characterization of Deformation and Fracture Behavior of Hot-Rolled Medium Manganese Lightweight Steel

JOM ◽  
2018 ◽  
Vol 70 (5) ◽  
pp. 700-705 ◽  
Author(s):  
Zheng-zhi Zhao ◽  
Rong-hua Cao ◽  
Ju-hua Liang ◽  
Feng Li ◽  
Cheng Li ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
In Situ Characterization ◽  
Lightweight Steel ◽  
Deformation And Fracture ◽  
Hot Rolled

Fracture of Laminated and In Situ Niobium Silicide-Niobium Composites

1996 ◽  
Vol 434 ◽  
Author(s):  
J. D. Rigney
Keyword(s):  
Low Temperatures ◽  
Fracture Resistance ◽  
Fracture Behavior ◽  
High Strain ◽  
Theoretical Models ◽  
High Yield ◽  
Strain Rates ◽  
High Strain Rates ◽  
Ductile Phase

AbstractThe mechanisms contributing to the fracture resistance of refractory metal intermetallic composites containing a BCC metallic phase (niobium) were investigated using model Nb-Si laminates and in situ composites. The controlling influence of ductile phase yield strength and fracture behavior were investigated by varying laminate processing parameters, and/or altering temperatures and applied strain rates during fracture experiments on all materials. The fracture behavior of “ductile” constituents were found to be influenced by phase grain size, solid solution content, constraint (as influenced by interfacial bond strengths), and the testing condition (high strain rates and low temperatures). The measured fracture resistance, when compared to theoretical models, was shown to be controlled by the “toughness” of the “ductile” phase and independent of the fracture behavior promoted (cleavage and ductile). The loss in ductility due to cleavage by high constraint, high strain rates and/or low temperatures was compensated by high yield and cleavage fracture stresses in order to provide a level of toughening similar to that contributed by ligaments which failed with lower yield stresses and greater strains.

Effects of temperature on fracture behavior of Al-based in-situ composites reinforced with Mg2Si and Si particles fabricated by centrifugal casting

2013 ◽  
Vol 23 (4) ◽  
pp. 923-930 ◽  
Author(s):  
Bo LI ◽  
Kai WANG ◽  
Ming-xiang LIU ◽  
Han-song XUE ◽  
Zi-zong ZHU ◽  
...  
Keyword(s):  
Fracture Behavior ◽  
Centrifugal Casting ◽  
In Situ Composites ◽  
Effects Of Temperature

Fracture Behavior of Vanadium/Vanadium Silicide In-Situ Composites

1992 ◽  
Vol 288 ◽  
Author(s):  
M. J. Strum ◽  
G. A. Henshall
Keyword(s):  
Fracture Behavior ◽  
In Situ Composites

Solidification Processing and Fracture Behavior of RuAl-Based Alloys

2004 ◽  
Vol 842 ◽  
Author(s):  
Todd Reynolds ◽  
David Johnson
Keyword(s):  
Solid Solution ◽  
Fracture Toughness ◽  
Fracture Behavior ◽  
Room Temperature ◽  
Volume Fraction ◽  
Solidification Processing ◽  
Ductile Phase

ABSTRACTAlloys of RuAl-Ru were processed using various solidification methods, and the fracture behavior was examined. The fracture toughness values for RuAl-hcp(Ru, Mo) and RuAl-hcp(Ru, Cr) alloys ranged from 23 to 38 MPa√m, while the volume fraction of RuAl ranged from 22 to 56 percent. Increasing the volume fraction of RuAl resulted in a decrease in fracture toughness. The hcp solid solution was shown to be the more ductile phase with a fracture toughness approaching 68 MPa?m, while the B2 solid solution (RuAl) was found to have a fracture toughness less than 13 MPa√m. An alloy of Ru-7Al-38Cr (at.%) that consisted of a hcp matrix with RuAl precipitates had the highest room temperature toughness and the greatest hardness.

Delineating brittle-phase embrittlement and ductile-phase toughening in Nb-based in-situ composites

2001 ◽  
Vol 32 (11) ◽  
pp. 2717-2727 ◽  
Author(s):  
Kwai S. Chan ◽  
David L. Davidson
Keyword(s):  
Ductile Phase ◽  
In Situ Composites ◽  
Brittle Phase
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