Publication

Characterisation of Laser Welds, between Nitinol and Stainless Steel Wires

Abstract

Nickel-Titanium (NiTi) shape memory alloys are often used in medical component devices, for instance as guide wires for neurological surgery applications. Manufacturing of such devices becomes more and more challenging, especially considering the need to join them with other metals, like Stainless Steel (SS). Laser welding is a promising technique to realize and to guaranty the mechanical stability of dissimilar metal welds. However, inherent differences in chemical compositions may lead to fracture of the weld due to the formation of brittle intermediate phases, such as TiFe or TiFe2. So it is important to characterise microstructure in a very efficient way. Both, pulsed Nd:YAG and continuous fibre laser were experimented to produce sound welds with sufficient tensile strength. Transmission (TEM) and Scanning Electron Mi- croscopy (SEM) were used to observe microstructure. Diffraction and Energy Dispersive Spectrometry (EDS) were used to determine phase structure and composition.

About this result
This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.