The role of stacking faults in the enhancement of the a-b plane peak in silver ion- irradiated commercial MOD REBCO wires

Author(s):  
Arya Ambadiyil Soman ◽  
Stuart C Wimbush ◽  
Martin W Rupich ◽  
Christian Notthoff ◽  
Patrick Kluth ◽  
...  
Keyword(s):  
2006 ◽  
Vol 980 ◽  
Author(s):  
James R. Morris ◽  
Yiying Ye ◽  
Maja Krcmar ◽  
Chong Long Fu

AbstractWe discuss the underlying atomistic mechanism for experimentally observed large tensile ductility in various strongly ordered B2 intermetallic compounds. First-principles calculations demonstrate that all of the compounds exhibit little energy differences between the B2, B27 and B33 phases. These calculations relate observations of ductility in YAg, YCu and ZrCo to shape-memory materials including NiTi. One transformation pathway between the B2 and B33 phases establishes a connection between this phase competition, and stacking faults on the {011}B2 plane. The low energy of such a stacking fault will lead to splitting of the b=<100> dislocations into b/2 partials, observed in ZrCo, TiCo, and in the B19' phase of NiTi. Calculations demonstrate that this pathway is competitive with the traditional pathway for NiTi.


1967 ◽  
Vol 45 (2) ◽  
pp. 481-492 ◽  
Author(s):  
B. Escaig ◽  
G. Fontaine ◽  
J. Friedel

The possible role of stacking faults is discussed in some problems of glide and twinning of cubic metals, especially at low temperatures.The first part analyzes a model for the thermal variation of macroyield in b.c.c. metals. If one assumes that the dislocations of such metals split along either the (110) or the (112) planes, the screw dislocations will be sessile. The strong temperature variation of macroyield could be due to the thermally activated slip of such screws, previously developed at lower stresses during the less temperature-dependent microyield. Reasonably high stacking-fault energies are required for satisfactory numerical fits.The second part studies the influence of a dense dislocation network on the propagation of a stacking fault. The friction force acting on the partial that propagates the fault must be taken into account when deducing a stacking-fault energy from the stress at which stacking faults develop in a strongly work-hardened (f.c.c.) metal. The trails of dipoles left at each tree crossed should prevent any creation of point defects; they should lead, after the faults have propagated some length, to its multiplication into a twin or martensitic lamella. The analogies with problems of slip bauds and dipole formation in easy glide are stressed.


2015 ◽  
Vol 388 ◽  
pp. 22-30 ◽  
Author(s):  
Thidarat Wongsawa ◽  
Niti Sunsandee ◽  
Anchaleeporn Waritswat Lothongkum ◽  
Ura Pancharoen ◽  
Suphot Phatanasri

2010 ◽  
Vol 247 (6) ◽  
pp. 1464-1468 ◽  
Author(s):  
K. Thonke ◽  
M. Schirra ◽  
R. Schneider ◽  
A. Reiser ◽  
G. M. Prinz ◽  
...  

2000 ◽  
Vol 652 ◽  
Author(s):  
Cagatay Yanar ◽  
Velimir Radmilovic ◽  
William. A. Soffa ◽  
Jorg M. K. Wiezorek

ABSTRACTDefects produced in massively transformed L10-ordered τ-MnAl have been characterized by detailed TEM studies. The defect population in massive τ-MnAl comprises arrays of overlapping stacking faults, {111}-conjugated microtwins, thermal antiphase boundaries and dislocations. The genesis of these defects has been attributed to atomic attachment faulting on {111}- and {020}-type facets of the essentially incoherent growth interface between the parent and product phases. The features of the defect genesis in τ-MnAl are discussed with respect to the role of atomic level processes at solid-state transformation interfaces in general and growth interfaces in massively transforming materials systems in particular.


1997 ◽  
Vol 26 (2) ◽  
pp. 53-63 ◽  
Author(s):  
L. H. Kuo ◽  
K. Kimura ◽  
S. Miwa ◽  
T. Yasuda ◽  
T. Yao

1993 ◽  
Vol 63 (22) ◽  
pp. 3023-3025 ◽  
Author(s):  
S. Guha ◽  
J. M. DePuydt ◽  
J. Qiu ◽  
G. E. Hofler ◽  
M. A. Haase ◽  
...  

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