SHAPE MEMORY ALLOYS

INTRODUCTION
Shape memory alloys are the alloys which exhibit shape memory effect
If such alloys are plastically deformed at one temperature, they will completely recover their shape on being raised to a higher temperature
INTRODUCTION
In recovering their shape alloys can produce a displacement or force (or both in some cases) as a function of temperature
We can make metals change shape, change position, expand, compress with heat as the only activator
Because of these propert ....etc

[:=Read Full Message Here=:]

SHAPE MEMORY ALLOYS
Introduction
Shape memory alloys (SMA's) are metals, which exhibit two very unique properties, pseudo-elasticity, and the shape memory effect. Arne Olander first observed these unusual properties in 1938 (Oksuta and Wayman 1998), but not until the 1960's were any serious research advances made in the field of shape memory alloys. The most effective and widely used alloys include NiTi (Nickel - Titanium), CuZnAl, and CuAlNi.
The two unique properties described above are made possi ....etc

[:=Read Full Message Here=:]

application of shape memory alloys ....etc

[:=Read Full Message Here=:]

Guideline for Aluminum Alloy Conductors for Distribution Feeder Applications with Recommendations for Connections



A Distribution Feeder Installation
1 Distribution feeder conductors in sizes #6 AWG to 1000 kcmil may be copper
or aluminum conductor material (ACM).
i. Aluminum alloy conductors shall be compact stranded conductors of
NUAL® (AA-8030) as manufactured by Alcan Cable or of a recognized
8000 Series aluminum alloy conductor material by the Alum ....etc

[:=Read Full Message Here=:]

Composites of shape memory alloys (SMA) with a matrix have been widely studied to suppress the propagation of damage. In these studies, the SMA is used as an actuator. A multi-functional SMA as both sensor and actuator is suitable for constructing intelligent material, such as a material with a sensing and suppressing function. The damage of materials is related to the amount of strain. We studied the use of SMA wire parts as sensors to measure the amount of strain for damage estimation. The acoustic emission (AE) signals induced by phase tran ....etc

[:=Read Full Message Here=:]

I want it for studies in smart material. ....etc

[:=Read Full Message Here=:]

Novel shape memory effect (SME) and pseudoelastic behavior are discovered in single-crystalline Au, Cu, and Ni nanowires with lateral dimensions of 1.5-10 nm. Under tensile loading and unloading, these wires can recover elongations of up to 50%, well beyond the recoverable strains of 5-8% typical for most bulk shape memory alloys (SMAs). Results of atomistic simulations and evidences from experiments show that this phenomenon only exists at the nanometer scale and is associated with a reversible crystallographic lattice reorientation driven byt ....etc

[:=Read Full Message Here=:]

Novel shape memory effect (SME) and pseudoelastic behavior are discovered in single-crystalline Au, Cu, and Ni nanowires with lateral dimensions of 1.5-10 nm. Under tensile loading and unloading, these wires can recover elongations of up to 50%, well beyond the recoverable strains of 5-8% typical for most bulk shape memory alloys (SMAs). Results of atomistic simulations and evidences from experiments show that this phenomenon only exists at the nanometer scale and is associated with a reversible crystallographic lattice reorientation driven byt ....etc

[:=Read Full Message Here=:]

ABSTRACT:
Conventional closed die forging, is widely used for manufacture of superalloy parts. Despite recent technological advancements in the area of forging design, empirical and trial-and-error methods are still widely used in forging super alloy materials. This paper investigates the effect of flash thickness and various geometrical forging design parameters including internal and external drafts and internal and external corner radii, on the die cavity filling, forging load and raw material cost when forging Nimonic80-A a supera ....etc

[:=Read Full Message Here=:]

Abstract
Conditions were determined for consistent coupling of a CO2 laser beam to weld 5182 aluminum
alloy sheet. Full penetration butt and bead-on-plate welds on 0.8 and 1.8 mm sheets were
performed. Process conditions examined included beam mode, spot size and irradiance,
shielding gas flow, and edge quality and fitup. The observed weld quality variations with the
different process parameters were consistent with physical phenomena and a threshold irradiance
model. Optimal conditions were determined for obtaining consistent wel ....etc

[:=Read Full Message Here=:]