Regularities of acoustic emission and thermoemission memory effect in coal specimens under varying thermal conditions

2007 ◽  
Vol 43 (4) ◽  
pp. 394-403 ◽  
Author(s):  
V. L. Shkuratnik ◽  
S. V. Kuchurin ◽  
V. A. Vinnikov
Keyword(s):  
Acoustic Emission ◽  
Memory Effect ◽  
Thermal Conditions

scholarly journals Нарушение эффекта Кайзера при нагружении эвтектических сплавов сиcтемы Pb-Sn

2020 ◽  
Vol 46 (18) ◽  
pp. 12
Author(s):  
Д.С. Салита ◽  
В.В. Поляков
Keyword(s):  
Acoustic Emission ◽  
Plastic Flow ◽  
Memory Effect ◽  
Mechanical Loading ◽  
Beta Phase ◽  
Repeated Loading ◽  
Kaiser Effect

This paper investigates acoustic emission under mechanical loading of Pb-Sn alloys. It is revealed that the Kaiser effect under repeated loading is not observed when certain concentrations of constituents lead to establishment of eutectic structures. The absence of acoustic emission memory effect in eutectic Pb alloys is explained. The proposed explanation is based on peculiar features of plastic flow caused by the motion of eutectic alpha- and beta-phase colonies at the joint interfaces.

Acoustic Emission Memory Effect in Coal Samples under Uniaxial Cyclic Loading

2006 ◽  
Vol 47 (2) ◽  
pp. 236-240 ◽  
Author(s):  
V. L. Shkuratnik ◽  
Yu. L. Filimonov ◽  
S. V. Kuchurin
Keyword(s):  
Acoustic Emission ◽  
Cyclic Loading ◽  
Memory Effect

Use of 2½ D imaging in analysis of NiTi martensite

1978 ◽  
Vol 36 (1) ◽  
pp. 610-611
Author(s):  
G. M. Michal
Keyword(s):  
Memory Effect ◽  
Monoclinic Phase ◽  
Reaction Path ◽  
Structural Characteristics ◽  
Salient Feature ◽  
Martensite Phase ◽  
Orientation Relationships ◽  
Low Symmetry ◽  
Hydride Phases ◽  
Unusual Shape

Several TEM investigations have attempted to correlate the structural characteristics to the unusual shape memory effect in NiTi, the consensus being the essence of the memory effect is ostensible manifest in the structure of NiTi transforming martensitic- ally from a B2 ordered lattice to a low temperature monoclinic phase. Commensurate with the low symmetry of the martensite phase, many variants may form from the B2 lattice explaining the very complex transformed microstructure. The microstructure may also be complicated by the enhanced formation of oxide or hydride phases and precipitation of intermetallic compounds by electron beam exposure. Variants are typically found in selfaccommodation groups with members of a group internally twinned and the twins themselves are often observed to be internally twinned. Often the most salient feature of a group of variants is their close clustering around a given orientation. Analysis of such orientation relationships may be a key to determining the nature of the reaction path that gives the transformation its apparently perfect reversibility.

Tensile Failure of 55-Nitinol Wire

1975 ◽  
Vol 33 ◽  
pp. 46-47
Author(s):  
F. I. Grace
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Stoichiometric Composition ◽  
Tensile Failure ◽  
Initial State ◽  
Initial Shape ◽  
Nitinol Wire ◽  
Cscl Type ◽  
Shear Transformation

An interest in NiTi alloys with near stoichiometric composition (55 NiTi) has intensified since they were found to exhibit a unique mechanical shape memory effect at the Naval Ordnance Laboratory some twelve years ago (thus refered to as NITINOL alloys). Since then, the microstructural mechanisms associated with the shape memory effect have been investigated and several interesting engineering applications have appeared.The shape memory effect implies that the alloy deformed from an initial shape will spontaneously return to that initial state upon heating. This behavior is reported to be related to a diffusionless shear transformation which takes place between similar but slightly different CsCl type structures.

Can Memory Effect Visual Perception?

2007 ◽  
Author(s):  
David Marshall ◽  
Paul Atchley
Keyword(s):  
Visual Perception ◽  
Memory Effect
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