Structural transitions in a NiTi alloy: a multistage loading-unload cycle
Journal Title: Frattura ed Integrità Strutturale - Year 2011, Vol 5, Issue 18
Abstract
NiTi shape memory alloys (SMAs) are increasingly used in many engineering and medical applications, because they combine special functional properties, such as shape memory effect and pseudo-elasticity, with good mechanical strength and biocompatibility. However, the microstructural changes associated with these functional properties are not yet completely known. In this work a NiTi pseudo-elastic alloy was investigated by means of X-ray diffraction in order to assess micro-structural transformations under mechanical uniaxial deformation. The structure after complete shape recovery have been compared with initial state.
Authors and Affiliations
Vittorio Di Cocco, Carmine Maletta, Stefano Natali
Fatigue crack growth behavior of Inconel 718 produced by selective laser melting
Additive layer manufacturing has recently gained a lot of interest due to the feasibility of producing metallic components directly from a computer-aided design file of the part. Selective laser melting, one of th...
Crack propagation in micro-chevron-test samples of direct bonded silicon-silicon wafers
Wafer bonding describes all technologies for joining two or more substrates directly or using certain intermediate layers. Current investigations are focused on so-called low temperature bonding as a special direct bondi...
In situ observation of rolling contact fatigue cracks by laminography using ultrabright synchrotron radiation
In rolling contact fatigue (RCF), cracks usually initiate from inclusions beneath the surface and propagate to the contact surface. In the present study, synchrotron radiation computed laminography (SRCL) ima...
Analysis of the causes of failure in 5Cr-1Mo pipes mounted in a preheating furnace
The oxidation resistance of iron-based alloys depends on the formation of thin protective films consisting of reaction products between the alloys and the ambient atmosphere. The high corrosion resistance of Fe-Cr-...
A numerical study of squeeze-film damping in MEMS-based structures including rarefaction effects
In a variety of MEMS applications, the thin film of fluid responsible of squeeze-film damping results to be rarefied and, thus, not suitable to be modeled though the classical Navier-Stokes equation. The simplest w...