Browsing Doctoral Theses by Thesis Supervisor "Chen, Zhan"
Now showing items 1-12 of 12
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Drillability of titanium alloy 6246
(Auckland University of Technology, 2018)Titanium alloys are relatively new materials that have been used extensively, especially in aerospace applications. The main properties are: a high strength to weight ratio (three times that of steel), an ability to maintain ... -
The Effect of Scan Speed on Lack of Fusion Formation During Electron Beam Melting of Ti-6Al-4V Alloy and Crack Growth Behaviour of the Alloy Under Impact and Fatigue Loading
(Auckland University of Technology, 2019)Electron beam melting (EBM) is a powder-bed fusion additive manufacturing process suitable for fabricating metallic parts with a high degree of shape complexity, opening EBM’s application potential with the Ti-6Al-4V alloy ... -
Effects of Increasing Laser Power on Microstructure Formed During Selective Laser Melting of Co-29Cr-6Mo Alloy
(Auckland University of Technology, 2018)For a wider medical/dental and aerospace applications of 3D printed parts made using selective laser melting (SLM) Co-29Cr-6Mo alloy, how SLM parameters affect the quality and properties of parts need to be understood. In ... -
Fatigue Behaviour of Aluminium Alloy AA2024 to Titanium Alloy Ti6Al4V Friction Stir Lap Welded Joints
(Auckland University of Technology, 2021)Friction stir welding (FSW) is a solid-state joining technique which can be used for joining not only similar or dissimilar aluminium alloys but also between aluminium alloys and other high melting temperature alloys. ... -
Fatigue Crack Growth Behaviour of Cobalt-based and Nickel-based Superalloy Processed by Selective Laser Melting
(Auckland University of Technology, 2021)The production of cobalt-based and nickel-based superalloys via Selective Laser Melting (SLM) has been successfully applied in low-mass production, particularly in producing components/equipment for the spacecraft and ... -
Investigation of Tribological Performance of Ti-6Al-4V Alloy Processed by Selective Laser Melting and Electron Beam Melting Processes
(Auckland University of Technology, 2021)Powder bed fusion (PBF) additive manufacturing (AM) or 3D printing, either laser based or electron beam based, is a recent advanced manufacturing process and is being more widely applied industrially. Ti-6Al-4V alloy is a ... -
Metallurgical studies of friction stir lap welding
(Auckland University of Technology, 2012)Friction stir welding (FSW) is a solid-state joining technique which can be used for joining not only traditionally weldable aluminium alloys but also high strength aluminium and other metallic alloys that are hard to weld ... -
Microstructure Evolution and Phase Transformation of Welded Metastable Beta-titanium Alloy (Ti-5Al-5V-5Mo-3Cr)
(Auckland University of Technology, 2016)Ti-5Al-5V-5Mo-3Cr (Ti5553, in wt%) is a recently developed metastable β titanium alloy, specifically designed to replace Ti-10V-2Fe-3Al (VT22) in the manufacture of large airplane components. The studies of Ti5553 have ... -
Modes and Progression of Tool Deterioration and Their Effects on Cutting Force During End Milling of 718Plus Ni-based Superalloy Using Cemented WC-CO Tools
(Auckland University of Technology, 2017)Understanding the detailed progression of cutting tool deterioration and how deterioration affects cutting force (F) during milling of difficult-to-cut Ni-based superalloys is important for the improvement of machinability ... -
Parameter optimization of the process of AA6xxx and AA7xxx series aluminium extrusion
(Auckland University of Technology, 2013)The mechanical properties and surface qualities of extruded aluminium products depend greatly on the micro-structural changes during the extrusion process. A clear understanding of the hermodynamics and tribology of the ... -
Thermomechanics, material flow and microstructure evolution during Friction Stir Processing of light cast alloys
(Auckland University of Technology, 2011)Friction Stir Processing (FSP) is a solid-state processing technique which can be used to refine and modify as-cast microstructures for superior properties. The aim of the present research is to investigate the following ... -
Understanding Material Flow at the Interface of Friction Stir Lap Welding (FSLW) of Al-to-Cu Plates
(Auckland University of Technology, 2019)Aluminium to copper bimetal parts have seen wide use in electrical componentry. A continuous interface between the two alloys is necessary in order to have unhampered electron path. Friction stir welding, especially in a ...