This compendium of twenty laboratory experiments on metals and alloys attempts to provide to students of Science and Engineering an insight about the relationship of the physical, specially mechanical properties of metals with grain structures/ microstructures. In almost all the experiments, therefore, the microstructural investigation is provided. Experiments have also been included on the determination of important mechanical and thermal properties and on the aqueous and atmospheric corrosion of metals. Theoretical background of each experiment has been dealt with in good detail in order to enable the student to understand the underlying principles and to appreciate the significance of the experiments.
Information which could not be accommodated in the text of the experiments, has been provided in the form of appendices. These include: reflection microscopy, experimental determination of transition points through cooling curves to get data for plotting phase diagrams, and quenching media for tempering of alloys. In view of the importance of microstructures for some metals and allaoys have also been given.
This book will be useful to the students of materials chemistry and materials science and students of various engineering courses. It will also be helpful to the students of industrial chemistry, practising engineers in metallurgical and mechanical engineering based industries.
1.To prepare specimens of some metals and alloys for microstructural examination 2. To find out the grain size and the relative amount of the constituent phases in single phase and 2-phase alloy systems 3. To determine the tensile strength, modulus of elasticity, yield stress and ductility % elongation and % reduction in area of mild steel, brass and aluminium and to observe necking 4. To determine the impact values of mild steel and grey cast iron 5. To determine the hardness values of mild steel and brass by Rockwell hardness testing machine 6. To find out the hardness number of copper and brass using Brinell’s hardness testing machine 7. (i) Construction of phase diagram of the binary eutectic alloy of Pb and Sn. (ii) To observe the microstructure of a few specimens of selected compositions of the above alloy system. Also to find out the shape and size of the grains in these specimens along with the relative amount of the constituent phases. (iii) To find out the hardness of the above specimens. 8. To prepare the peritectic alloy of Cu and Zn of the following compositions and to study their microstructure and hardness 9. To study the microstructure, grain size and hardness eutectoid hypo-eutectoid and hypereutectoid steel. 10. To study the microstructure and hardness of annealed and normalized plain carbon steel having 0.4% C and 1.2% C, also to study the spheroidized annealing of 1.2% C steel 11. To study the mechanical properties and microstructures of some hardened plain carbon steel specimens (0.4%, and 1.2% C) on tempering at different temperatures 12. To study precipitation strengtheningage hardening of Al-4% Cu alloy 13. To study the effect of time of tempering on the mechanical properties of high carbon steel 14. To study the effect of precipitation hardening on Al 4% copper alloy at different temperatures on the hardness of the alloy (alternative method) 15. To study the effect of cooling rate on the transformation in 0.8% C steel 16. To study the effect of cold working on the hardness of some selected metals and alloys and also effect of annealing on such cold materials 17. To study the effect of recovery, recrystallization and grain growth (annealing) in a plastically deformed metal on its microstructure (grain structure) and mechanical properties (hardness) 18. To evaluate corrosion and corrosion inhibition of mild steel in aqueous environment 19. To evaluate the rate of high temperature oxidation of iron and also observe the morphology of the oxidized specimens 20. To determine the amount of lead in brass using Differential Scanning Calorimetry (DSC) Appendices Index
S.M. Ashraf :- S.M. Ashraf, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New DelhiSharif Ahmad :- Sharif Ahmad, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New DelhiUfana Riaz :- Ufana Riaz, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia, New Delhi