Controlling metastability in additively manufactured alloys undergoing deformation-induced transformations
Lead Research Organisation:
Lancaster University
Department Name: Engineering
Abstract
Steel, titanium and manganese alloys undergo deformation-induced transitions; these include the formation of martensite and twinning under stress. Such transitions are accompanied by a significant improvement in properties such as strength, ductility and toughness. Compared to wrought alloys, those produced by additive manufacturing (AM) display a complex microstructure amenable to tailoring. This project will focus on developing and adapting models for describing the microstructure-properties relationship in AM microstructures. A range of AM microstructures will be designed and built for mechanical testing for further characterised to prove the accuracy of the models. The work will be performed in partnership with LPW Technology as part of the Royal Academy of Engineering Research Chair held by Professor Pedro Rivera, and under the co-supervision of Dr Bij-Na Kim.
Organisations
People |
ORCID iD |
Pedro Rivera (Primary Supervisor) | |
Hossein Eskandari Sabzi (Student) |
Publications
Eskandari Sabzi H
(2022)
Encyclopedia of Materials: Metals and Alloys
Eskandari Sabzi H
(2019)
Defect Prevention in Selective Laser Melting Components: Compositional and Process Effects.
in Materials (Basel, Switzerland)
Eskandari Sabzi H
(2019)
Powder bed fusion additive layer manufacturing of titanium alloys
in Materials Science and Technology
Eskandari Sabzi H
(2022)
Encyclopedia of Materials: Metals and Alloys
Eskandari Sabzi H
(2020)
Composition and process parameter dependence of yield strength in laser powder bed fusion alloys
in Materials & Design
Sabzi H
(2020)
Controlling crack formation and porosity in laser powder bed fusion: Alloy design and process optimisation
in Additive Manufacturing
Sabzi H
(2021)
Strengthening control in laser powder bed fusion of austenitic stainless steels via grain boundary engineering
in Materials & Design
Sabzi H
(2020)
Grain refinement in laser powder bed fusion: The influence of dynamic recrystallization and recovery
in Materials & Design
Sabzi H
(2022)
Deformation twinning-induced dynamic recrystallization during laser powder bed fusion
in Scripta Materialia
Zhao J
(2022)
Modelling stress relaxation after hot deformation: Microstructure-property relationships in Nb-bearing steels
in International Journal of Plasticity
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
EP/R513076/1 | 30/09/2018 | 29/09/2023 | |||
2145111 | Studentship | EP/R513076/1 | 30/09/2018 | 29/09/2021 | Hossein Eskandari Sabzi |
Description | 1. Optimal processing parameters to produce stainless steel parts via additive manufacturing. 2. Relationship between microstructure-properties-processing in additively manufactured stainless steels. 3. Implementing the models originally developed for stainless steels to other alloy families such as nickel and titanium alloys. 4. Optimisation of mechanical properties of the additively manufactured stainless steels. |
Exploitation Route | The models developed for alloy composition and microstructural design in this project can be used by other researchers to further improve the properties of the alloys built by additive manufacturing. |
Sectors | Aerospace Defence and Marine Energy Manufacturing including Industrial Biotechology |