Project 79：Microstructural/Phase Evolution and the Mechanical Property of Wire-Arc Additively Manufactured Nickel-Titanium Shape Memory Alloy
Contact Information:
Assistant Prof. Chen Shen
Email: cshen486@sjtu.edu.cn
Project Description and Objectives:
Nickel-titanium (NiTi) has been continuously attractive for applications in aerospace and medical devices industries due to its excellent functional features such as shape memory and super-elasticity effect which are based on the solid-solid phase transformation between martensite and austenite. Besides its low stiffness, biocompatibility, and excellent erosion, corrosion and wear resistance of NiTi are what truly make this alloy the most competitive candidate for biomedical applications such as artificial bones and bio-parts. The Current Additive Manufacturing (AM) method (selective-laser-melting, SLM) for NiTi always brings a porosity defect which is unacceptable for a structural component. Because of this, Wire-Arc Additive Manufacturing (WAAM) has currently been introduced for the AM of NiTi due to its full-density manufacturing nature. The present research project aims to: (1) systematically characterize the microstructural performance and mechanical properties of the WAAM fabricated NiTi alloy under both as-fabricated and heat-treated conditions; (2) analyze the phase evolution of WAAM fabricated NiTi alloy during heat treatment using the in-situ diffraction method.
Eligibility Requirements:
Applicant should have a basic knowledge of metal additive manufacturing.
Applicant should have a basic knowledge of crystallography and diffraction experiments (XRD, EBSD).
Main Tasks:
Finishing a research thesis.
Giving two presentations (1. Literature review; 2. Technical presentation).
Website:
School: http://smse.sjtu.edu.cn