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Materials processing; phase transformations in metals and alloys; aluminium and ferrous alloys.
This course introduces students to the material thermodynamics and kinetics that underpin the materials science and engineering from ENME207. Students will gain a deeper understanding of structure-processing-property-performance relations in metallic systems through lectures and laboratories.The course is co-taught with ENME407 but requires an independent research report and presentation of results to the undergraduates on a topic related to the taught course content.
Knowledge outcomes:Describe the relation between Gibbs free energy, phase stability and driving forces.Understand models for chemical potential and activity of components in solution.Understand the different diffusion coefficients and when to use each.Describe recovery, recrystallization and grain growth, when each is important and the effect on material properties.Describe casting microstructures and cating defects and how to reduce them.Describe the evolution of microstructure in Al alloys and steels during processing.Describe evolution of welding microstructures and resultant properties.Describe uses and limitations of optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and electron backscatter diffraction (EBSD).Skills outcomes:Sketch the Gibbs free energy curves that correspond to simple phase diagrams.Predict equilibrium structure of alloy from phase diagram.Calculate driving forces for phase transformations.Solve diffusion problems corresponding to common materials processing routes.Apply equations of nucleation and growth to solidification and solid-state phase transformations.Calculate rates of transformation and understand relation to TTT diagrams.Design processing routes to achieve desired properties in Al alloys and steels using CCT diagrams.Personal attributes developed:Ability to communicate technical materials concepts with other engineers.Ability to interpret technological handbook information for ferrous and non-ferrous alloys.Ability to write laboratory reports including appropriate statistical analysis.Ability to locate and synthesise relevant technical materials literature into a written literature review and presentation.
Subject to approval of the Head of Department. RP: Bachelors degree in Engineering or equivalent
ENME407, ENME 457, ENME 657, ENME 337
Bachelors degree in Engineering or equivalent
LEARN Website:The most up-to-date information will be posted on the LEARN site.Course announcements will be made via the News Forum.Lecture Handouts:Lecture notes will be posted in the Lecture section of the LEARN site. You should bring them to the lectures to annotate on either a soft or hard copy.
Catherine Bishop
Lecturer:Dr Catherine Bishop:catherine.bishop@canterbury.ac.nz; Civil/Mech Room E514; phone x92137Teaching Assistants:Mr Oscar Torres oscar.torresmatheus@pg.canterbury.ac.nzMr Shaun Mucalo shaun.mucalo@pg.canterbury.ac.nzMr Aaron Beardsley aaron.beardsley@pg.canterbury.ac.nz
Assessment:This course has a variety of assessment: some is formative and some is summative. Formative assessment helps you to assess how effectively you are mastering the learning objectives for a course. Summative assessment assesses whether you have met the learning objectives for the course. Table 1 summarizes course assessment. Due dates are provisional and should be confirmed in the Course Information System at the end of week 2. Coversheets:All work handed in for marking must have a signed Departmental coversheet attached, unless submitted to LEARN. Signing the coversheet means that (a) you attest that you’ve read and understood the Department’s Policy on Dishonest Practice and (b) the work is yours alone. Coversheets are available at the Department’s reception on level 5 of Civil/Mechanical building. Turnitin originality detection software will be used to screen work for plagiarism.Homework:Problem sets will be available on LEARN weekly. Homework solutions will be posted to the LEARN site on the day following the due date, after which time no late work will be accepted.Drop-in Homework Sessions:A drop-in session will be organized starting in week 2. The lecturer and TA will be available to answer homework and laboratory questions. The time will be chosen in the first week of lectures. This is not a compulsory course activity.Laboratories: There are four laboratories. Lab sheets will be provided at the beginning of each session.You will be asked to select your laboratory sessions in MyTimetable during the first week of the semester. If you haven’t picked in this time, you will be assigned to a lab group.You must attend the lab sessions given on MyTimetable. No swapping or switching is allowed without prior approval due to space and time constraints. It is your responsibility to obtain permission to attend a different session from the lecturer in good time. The labs start promptly, so please allow enough travel time to arrive before the designated start time.Laboratory Reports/Worksheets:There will be one formal laboratory report for the lab Heat Treatment of Aluminium Alloys. Guidelines for the report will be posted on LEARN, and you must follow them for content, style and completeness. Good communication skills are essential for professional engineers, and so 25% of the marks for the formal lab report are based on communication.The other labs have worksheets with structured questions to answer and turn in. You will need to do some independent study after the laboratory sessions in order to complete this work.Lab reports/worksheets are due one week after the lab to the corresponding LEARN dropbox. Mid-term Test:There is a 50 minute mid-term test for which you are allowed to bring in two sides of A4 paper with your own hand-written notes. You should also bring a calculator and ruler.Literature Review Assignment:You will complete a literature review on a topic to be agreed with the lecturer. You will write a formal literature review (15-20 pages) with references as a report. You will give a 15 minute presentation of the topic to the ENME407 class.Final Exam:There will be a two-hour final exam. You will be allowed two sides of A4 paper with your own hand-written notes. You should also bring a calculator and ruler. There will be a tutorial in study week to help you prepare for the exam.Final Examination Mark Required to Pass Course:In order to pass the course, you must attain at least 40% of the marks on the final examination. This means that a student who has an overall course mark of 53% with a 39% on the final examination will receive a grade of D rather than C-. Additional information:Please review the Department/UC policies on coursework, dishonest practice, special consideration (replacement process for aegrotats) and requests to complete assessment on alternate dates at http://www.canterbury.ac.nz/engineering/schools/mechanical/student-advice-and-support/academic-advice/A lateness penalty of 20% will be applied to all coursework turned in after the due date but before model answers are released.The Faculty of Engineering policy on the Common Grading Scale will be used to form grades. See http://www.engf.canterbury.ac.nz/resources.shtml#ugIf you have questions on any of this document or about any aspect of the course, please talk to your lecturer.
Porter, David A. , Easterling, K. E., Sherif, Mohamed Y; Phase transformations in metals and alloys ; 3rd ed. ; CRC Press, 2009 ((Revised reprinted version) or 2nd edition if you can find it. The library has copies of both).
Required Reading Material:Reading assignments will be given throughout the term. Completion of these assignments is essential for the course. To maximise learning, you must complete the reading from the required text, selected chapters of other books that will be posted on LEARN, and the additional references posted on LEARN.
Lecture Topics:1. Thermodynamics and Phase DiagramsSingle component systemsBinary solutionsBinary phase diagramsTernary phase diagramsComputation of phase diagrams2. Microstructural CharacterisationMetallographySEM, EDS, EBSD, XRD3. DiffusionInterstitial diffusionSubstitutional diffusionDiffusion coefficientsHigh diffusivity pathsGalvanising4. Crystalline InterfacesInterfacial free energySolid/vapour and solid/liquid interfacesGrain boundariesInterphase interfacesStrain effects at interfacesWulff shape and precipitate shapes5. Interface MigrationDiffusion-controlled and interface-controlled growthGibbs-Thomson effectGrain growthRecovery and recrystallization6. SolidificationHomogeneous and heterogeneous nucleationSingle component solidificationAlloy solidificationConstitutional supercoolingEutectic solidificationDendrite arm spacingMacro and microstructure of castings and casting defects7. Solid State Phase TransformationsNucleationDiffusion controlled growth of precipitatesOstwald ripeningJMAK kineticsTTT diagrams8. Al alloysClasses of alloysGP zones and metastable precipitatesMicrostructural development in wrought alloysStructure-processing-property relations9. SteelsClasses of steels (plain carbon, low alloy steels, stainless steels)Phases and microconstituents (ferrite, austenite, bainite, martensite, pearlite, spheroidite, alloy carbides)CCT diagramsHardenability and Jominy end-quench testTempered martensiteMicrostructural development Structure-processing-property relations10. Introduction to WeldingWelding and continuous castingHeat transfer and solidificationWelding defectsHeat affected zoneA laboratory characterizing phases formed between solder and Cu and relation to the equilibrium phase diagram. A structured worksheet is required for this lab.A laboratory measuring tensile properties of two aluminium alloys in several different tempers and relating properties to the processing conditions. Simple statistical analysis is required using previous years’ data. A formal report is required for this lab.A laboratory characterising Jominy end-quench test hardness profiles and microstructure in a medium carbon (AISI 1040) steel and an alloy steel (AISI 4340) and relating these to the CCT diagrams and weldability. A structured worksheet is required for this lab.An independent literature review on a topic to be agreed with the lecturer. An oral presentation to the ENME407/ENME607 class and a written report are required.
Domestic fee $1,038.00
International Postgraduate fees
* All fees are inclusive of NZ GST or any equivalent overseas tax, and do not include any programme level discount or additional course-related expenses.
For further information see Mechanical Engineering .