'Eutectoid' presentation slideshows

PHASE TRANSFORMATIONS

PHASE TRANSFORMATIONS. Nucleation Growth APPLICATIONS ? Transformations in Steel ? Precipitation ? Solidification & crystallization ? Glass transition ? Recovery, Recrystallization & Grain growth . Phase Transformations in Metals and Alloys David Porter & Kenneth Esterling

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Chapter 9

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Chapter 9

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Interactive MENG 426 Lab Tutorials Experiment (4) Eutectoid, Hyper- & Hypo- Alloys

The American University in Cairo Mechanical Engineering Department MENG 426: Metals, Alloys & Composites. Interactive MENG 426 Lab Tutorials Experiment (4) Eutectoid, Hyper- & Hypo- Alloys. Prepared by Eng. Moataz M. Attallah Fall 2002. Outline. Review: phase diagrams & invariant reactions

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Diffusion

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Class 6

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The Fe-C system

Beware the seeds you sow and the crops you reap. Do not curse God for the punishment you inflict upon yourself -Orange Catholic Bible. The Fe-C system. Pearlite. The Fe-C system. See time-temperature-transformation (TTT) curves - this one for 0.8 w/o C. Pearlite is two phases FE + CM.

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The Fe-C system

The Fe-C system. Pearlite. The Fe-C system. See time-temperature-transformation (TTT) curves - this one for 0.8 w/o C. Pearlite is two phases FE + CM. Pearlite forms by diffusion - takes time. diffusion rate high, ? G rxn low . diffusion rate low, ? G rxn high. The Fe-C system.

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Phase Diagram

Phase Diagram. EUTECTOID AND PERITECTIC REACTIONS. The Eutectic Reaction. The Peritectic Reaction. Examples: Cu-Zn, Fe-C, Ag-Pt. The Eutectoid Reaction. Examples: Fe-C, Cu-Zn. The Peritectoid Reaction. Examples: Ag-Al, Al-Cu. The Monotectic Reaction. Examples : Cu- Pb.

923 views • 7 slides