Lai, F., Qu, S., Lewis, R. orcid.org/0000-0002-4300-0540 et al. (4 more authors) (2019) Optimization of friction welding process parameters for 42Cr9Si2 hollow head and sodium filled engine valve and valve performance evaluation. Materials, 12 (7). 1123. ISSN 1996-1944
Abstract
Due to their design, hollow cavity and filled sodium, hollow head and sodium filled engine valves (HHSVs) have superior performance to traditional solid valves in terms of mass and temperature reduction. This paper presents a new manufacturing method for 42Cr9Si2 steel hollow head and sodium filled valves. An inertia friction welding process parameter optimization was conducted to obtain a suitable process parameter range. The fatigue strength of 42Cr9Si2 steel at elevated temperatures was evaluated by rotating bending fatigue test with material specimens. Performance evaluation tests for real valve components were then carried out using a bespoke bench-top apparatus, as well as a stress evaluation utilizing a finite element method. It was proved that the optimized friction welding parameters of HHSV can achieve good welding quality and performance, and the HHSV specimen successfully survived defined durability tests proving the viability of this new method. The wear resistance of the HHSV specimens was evaluated and the corresponding wear mechanisms were found to be those classically defined in automotive valve wear.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | hollow head engine valve; manufacturing method; inertia friction welding; fatigue property; wear property |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 18 Apr 2019 09:42 |
Last Modified: | 18 Apr 2019 10:35 |
Status: | Published |
Publisher: | MPDI |
Refereed: | Yes |
Identification Number: | 10.3390/ma12071123 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:144615 |