Effect of material processing on properties of materials
- 1. Academic Event By: Seyoum Kebede Ata (PhD) May,2019 start “Effect of material Processing on Mechanical Properties of composite Materials” (case of E-Glass Epoxy)
- 2. OUTLINES OF PRESENTATION 1 INTRODUCTION Heat Treatment methods Processing methods and materials Evaluation for materials Conclusions
- 3. Result Variation in depth with variation in Relative Humidity 3 0%RH 10%RH5%RH 15%RH 20%RH 40%RH 45%RH30%RH25%RH 35%RH
- 4. Composite materials are exponentially growing up and rapidly gaining importance because of their potential to produce the components that features low density while maintain high stiffness, strength, thermal stability, improved fatigue properties and wear resistance. The main purpose of processing and using composite materials in the new technology is for reducing weight of components keeping and improving the their strength. The advantage of weight reduction operation on transmission system is mostly to reduce power/fuel consumption and helps for maximum torque transfer capacity from driving to driven members. These days, the main reason for material processing is due to lack of ductility and strength, low wear resistance, and failure due to friction. 1. INTRODUCTION 2
- 5. 2. Heat Treatment methods 3 These days most of the papers and journals are specifically on materials are related to Tribochemical effects of single crystalline solids, as SiO2, E-Glass Epoxy, Aluminum Alloys, and Etc. Heat Treatment Heat treatment operation is a means of controlled heating and cooling to change mechanical properties. Heat treatment is also used to increase the strength of materials by altering some certain manufacturability like forging and welding The Heat treatment generally is classified into 3 main parts. Thermal treatment process Thermochemical Process Thermo mechanical process
- 6. Cont. OVER ALL VIEW OF HEAT TREATMENT Normalizing process:- is a metallurgical and metalworking process used to increase the hardness of a metal Annealing process:- heated to a specific temperature /colour and then allowed to cool slowly Tempering process:- increase the toughness of Iron-based Alloys. Hardening process:- is a heat treating process that is often considered from both thermal and micro structural standpoints 4
- 7. In general, among those Stir- Casting method, two composite material processing methods were employed namely; (a) compression molding: two matched metal moulds, with the upper moving and lower stationary, are used to produce the composite. and (b) open casting methods/ hand lay-up : It was found that the heat-treatment causes a change in the mode of degradation of the fiber. Figure also shows variation in surface and stiffness of composite materials. 3. Processing Methods and Materials 5
- 8. Tests to be done:- Hardness test, wear test and tensile test were carried out with and without heat treated composites specimens. 3.1 Heat Treatment Vs Degradation processes 6
- 9. i. Fracture surface degraded composite Heat treated surface ii. Fracture surface of degraded composite for non heat treated surface Cont. 7
- 10. Pmax= 0.0043Mpa, for Gray Cast Iron Pmax= 0.0037MPa, for E-Glass Epoxy 4. Evaluation of composite Materials for strength 8 Total deformation of GCI Total Deformation of E-Glass Epoxy Selected materials Total deformation (mm) Equivalent elastic strain (mm/mm) Equivalent Stress (MPa) E-glass Epoxy UD 1.6427 * 10-7 4.8391 * 10-8 0.00041 Gray Cast Iron 1.7327 * 10-7 4.2364 * 10-8 0.00463
- 11. 5. Conclusion In these report and analysis of composite materials. The composite samples were subjected to mechanical testing namely tensile, flexural and impact tests. Based on the results of the tests, and the discussions there from, the following conclusions were drawn:- found that the heat-treatment causes a change in the mode of degradation of the fibers that is attributed to the relaxation of the glass structure. The heat-treatment also increases the fiber stiffness but causes an initial loss in strength that recovers as the fiber degrades. So, that the fiber have better long term retention. Material processing is useful to increase those basic prosperities of materials (i.e. Mechanical, Chemical, Electrical etc.) Material treatment and processing is also mainly useful to have better surface finish. Useful to increase strength, Ductility, hardness and reduce the weight of materials 9
- 12. Thank you for your Attention!! End 10