Thesis Chapters by Mete Demirörer
The focus of this research is to show how high sustainability rates can be achieved through light... more The focus of this research is to show how high sustainability rates can be achieved through lightweighting in the cost-effective way and to demonstrate what type of benefits mass reduction provides. The main goal of this research is to fill a gap in the literature about automotive sector and to reveal some functional solutions for the automotive giants through performing tests for obtaining meaningful data. In this study, researcher wanted to combine environmental, economic and social aspects for generating high qualified component for Dennis Eagle - one of the major automotive manufacturing companies across the United Kingdom - through reviewing the literature for finding effective solution to increase the lifespan of this component against abrasion.
This paper attempts to show how the wear resistance of the rear loading segment of the refuse collection trucks of Dennis Eagle can be increased and how this contribute to the sustainability and profitability of the company. The abrasion and fretting resistance of the component was improved through applying some surface modification techniques – heat treatments and coatings – After examination of the needs and requirements of the relevant part of the rear loading segment of refuse collection trucks of Dennis Eagle, carbonitriding, ferritic nitrocarburizing (Nitrotec), gas nitriding and WC – Ni thermal spray coatings were applied on the surface of this part. Their morphology and characteristics were identified through examining the microstructure and hardnesses and compared with the existing properties of this part. The findings of this research explore some illustrations about that WC – Ni thermal spray coatings and carbonitriding processes gave the effective results about improving the wear resistance of the structure through increasing the hardness of the surface and this has high influence on improving the lifespan of the relevant component. In this study, researcher provided how beneficial these purposed heat treatments and coatings are and what type of benefits they provide in the context of cost-effectiveness and sustainability through reducing the thickness of the existing steel of this segment.
After performing experimental procedure, some recommendations have been set for further research work in this dissertation through identification of limitations of this study. A natural progression of this work is to provide a new perspective on how the sustainability can be achieved through elimination of the wear related problems and to purpose a roadmap for the further studies about the lightweighting concepts for designing a satisfactory and commercially successful automotive product. These purposed steps can be found as suggested future work and recommendations in this dissertation. Although this research contains some limitations, this study provides effective and remarkable perspective about increasing the sustainability in the cost-effective way.
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Welding is a widely used process in industry because welding techniques have some striking featur... more Welding is a widely used process in industry because welding techniques have some striking features which are included in this project. In other way of saying, welding techniques will be so important in human life in the future because of their unique specialties. For this reason, researches and studies on welding are increasing day by day.
Welding is used in different areas in industry and it has various features. Welding is especially used in the manifacturing area, as a connector between materials in the existence of heat and pressure (with or without additional materials). The main targets in this process are; lowest cost, highest satisfaction in performance and longest life.
In this project, the importance of choosing a suitable production regarding to the intended features and how to improve the mechanical features, tried to be explained. Therefore, the welding process which is going to be applied to the materials which has different metal content, are virtually modelled by using Ansys Workbench software.
Parameters as, used materials and chosen welding techniques within this project are widely explained. Experimental studies were done in order to help the project to enlighten the future studies and to make the project based on numerical data (simplifies prooving). In the other parts of the experimental studies, welding process is applied to the materials which have different metal contents by using Ansys Workbench software. Modelling a material using different welding techniques before production gives more practical and more proactive vision.
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Papers by Mete Demirörer
MATEC Web Conf. The 17th International Conference on Aluminium Alloys 2020 (ICAA17), 2020
An innovative process design, to avoid thermal degradation during autogenous fusion welding of hi... more An innovative process design, to avoid thermal degradation during autogenous fusion welding of high strength AA 2024-T4 alloy, based on laser beam welding, is being developed. A series of instrumented laser welds in 2 mm thick AA 2024-T4 alloys were made with different processing conditions resulting in different thermal profiles and cooling rates. The welds were examined under SEM, TEM and LOM, and subjected to micro-hardness examination. This allowed us to understand the influence of cooling rate, peak temperature, and thermal cycle on the growth of precipitates, and related degradation in the weld and heat affected area, evident as softening. Although laser beam welding allows significant reduction of heat input, and higher cooling rates, as compared to other high heat input welding processes, this was found insufficient to completely supress coarsening of precipitate in HAZ. To understand the required range of thermal cycles, additional dilatometry tests were carried out using the same base material to understand the time-temperature relationship of precipitate formation. The results were used to design a novel laser welding process with enhanced cooling, such as with copper backing bar and cryogenic cooling.
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Thesis Chapters by Mete Demirörer
This paper attempts to show how the wear resistance of the rear loading segment of the refuse collection trucks of Dennis Eagle can be increased and how this contribute to the sustainability and profitability of the company. The abrasion and fretting resistance of the component was improved through applying some surface modification techniques – heat treatments and coatings – After examination of the needs and requirements of the relevant part of the rear loading segment of refuse collection trucks of Dennis Eagle, carbonitriding, ferritic nitrocarburizing (Nitrotec), gas nitriding and WC – Ni thermal spray coatings were applied on the surface of this part. Their morphology and characteristics were identified through examining the microstructure and hardnesses and compared with the existing properties of this part. The findings of this research explore some illustrations about that WC – Ni thermal spray coatings and carbonitriding processes gave the effective results about improving the wear resistance of the structure through increasing the hardness of the surface and this has high influence on improving the lifespan of the relevant component. In this study, researcher provided how beneficial these purposed heat treatments and coatings are and what type of benefits they provide in the context of cost-effectiveness and sustainability through reducing the thickness of the existing steel of this segment.
After performing experimental procedure, some recommendations have been set for further research work in this dissertation through identification of limitations of this study. A natural progression of this work is to provide a new perspective on how the sustainability can be achieved through elimination of the wear related problems and to purpose a roadmap for the further studies about the lightweighting concepts for designing a satisfactory and commercially successful automotive product. These purposed steps can be found as suggested future work and recommendations in this dissertation. Although this research contains some limitations, this study provides effective and remarkable perspective about increasing the sustainability in the cost-effective way.
Welding is used in different areas in industry and it has various features. Welding is especially used in the manifacturing area, as a connector between materials in the existence of heat and pressure (with or without additional materials). The main targets in this process are; lowest cost, highest satisfaction in performance and longest life.
In this project, the importance of choosing a suitable production regarding to the intended features and how to improve the mechanical features, tried to be explained. Therefore, the welding process which is going to be applied to the materials which has different metal content, are virtually modelled by using Ansys Workbench software.
Parameters as, used materials and chosen welding techniques within this project are widely explained. Experimental studies were done in order to help the project to enlighten the future studies and to make the project based on numerical data (simplifies prooving). In the other parts of the experimental studies, welding process is applied to the materials which have different metal contents by using Ansys Workbench software. Modelling a material using different welding techniques before production gives more practical and more proactive vision.
Papers by Mete Demirörer
This paper attempts to show how the wear resistance of the rear loading segment of the refuse collection trucks of Dennis Eagle can be increased and how this contribute to the sustainability and profitability of the company. The abrasion and fretting resistance of the component was improved through applying some surface modification techniques – heat treatments and coatings – After examination of the needs and requirements of the relevant part of the rear loading segment of refuse collection trucks of Dennis Eagle, carbonitriding, ferritic nitrocarburizing (Nitrotec), gas nitriding and WC – Ni thermal spray coatings were applied on the surface of this part. Their morphology and characteristics were identified through examining the microstructure and hardnesses and compared with the existing properties of this part. The findings of this research explore some illustrations about that WC – Ni thermal spray coatings and carbonitriding processes gave the effective results about improving the wear resistance of the structure through increasing the hardness of the surface and this has high influence on improving the lifespan of the relevant component. In this study, researcher provided how beneficial these purposed heat treatments and coatings are and what type of benefits they provide in the context of cost-effectiveness and sustainability through reducing the thickness of the existing steel of this segment.
After performing experimental procedure, some recommendations have been set for further research work in this dissertation through identification of limitations of this study. A natural progression of this work is to provide a new perspective on how the sustainability can be achieved through elimination of the wear related problems and to purpose a roadmap for the further studies about the lightweighting concepts for designing a satisfactory and commercially successful automotive product. These purposed steps can be found as suggested future work and recommendations in this dissertation. Although this research contains some limitations, this study provides effective and remarkable perspective about increasing the sustainability in the cost-effective way.
Welding is used in different areas in industry and it has various features. Welding is especially used in the manifacturing area, as a connector between materials in the existence of heat and pressure (with or without additional materials). The main targets in this process are; lowest cost, highest satisfaction in performance and longest life.
In this project, the importance of choosing a suitable production regarding to the intended features and how to improve the mechanical features, tried to be explained. Therefore, the welding process which is going to be applied to the materials which has different metal content, are virtually modelled by using Ansys Workbench software.
Parameters as, used materials and chosen welding techniques within this project are widely explained. Experimental studies were done in order to help the project to enlighten the future studies and to make the project based on numerical data (simplifies prooving). In the other parts of the experimental studies, welding process is applied to the materials which have different metal contents by using Ansys Workbench software. Modelling a material using different welding techniques before production gives more practical and more proactive vision.