CHEMMAT 204 : Materials

Engineering

2020 Semester One (1203) (15 POINTS)

Course Prescription

Solid state transformation – diffusion, vacancies, solidification, nucleation and growth. Dislocations and plastic deformation, strengthening mechanisms. Mechanical performance of materials. Iron-carbon alloy systems and transformations (including pearlitic, austenitic, bainitic and martensitic), effects of alloying elements. Analytical methods: X-ray diffraction and electron microscopy.

Course Overview

Module 1: Phase transformation in steel: Understand origin & formation of ferrite from austenite; various carbides; understand the use of TTT and CCT diagrams; describe the transformation of martensite in plain carbon steel and alloy steels; understand the relationship between hardness and strength;
Module 2: Characterisation: Comprehension of the fundamental principles of X-ray diffraction as it relates to the analysis of crystalline materials. Ability to Evaluate how XRD can be used to investigate the effects of material processing on its structure. Analysis skills required to identify unknown materials from their diffraction patterns, and to evaluate the effects of changes in XRD patterns based on material processing /structure. Comprehension of the fundamental principles of SEM and the ability to explain the information obtained from SEM.
Module 3: Vacancy, diffusion, solidification and annealing: Comprehension in relation to annealing, diffusion, Fick's laws, hardenability, heterogeneous nucleation, homogeneous nucleation, nucleation, analysis and synthesis skills in relation to steel and comprehension in relation to work hardening.
Module 4: Strengthening Mechanisms: Evaluation of how a strengthening method to strengthen the metallic materials; Describe the Frank-Read source; Name various types of important strengthening mechanisms Using dislocation theory to explain the strengthening mechanisms; calculate critical resolved shear stress.
Module 5: Mechanical Performance and Fracture: Mechanical Testing. Fracture; Griffith theory. Fracture mechanics; stress intensity approach, KIc, application. Transitional modes; notch impact testing, notch effect, crack formation, the effect of grain size, alloying, etc. Ductile fracture. Hydrogen embrittlement. Stress corrosion cracking. Fatigue, S-N curve, fracture mechanics approach, theories of fatigue, variables. Creep, creep mechanisms, high-temperature alloys

Course Requirements

Prerequisite: CHEMMAT 121 Restriction: CHEMMAT

Capabilities Developed in this Course

Capability 1: Disciplinary Knowledge and Practice
Capability 2: Critical Thinking
Capability 3: Solution Seeking
Capability 4: Communication and Engagement

Learning Outcomes

By the end of this course, students will be able to:
  1. Understand and explain the principles of XRD, in particular, the Bragg Law (Capability 1.1)
  2. Apply the XRD principles to identify the unknown materials (Capability 1.1 and 3.1)
  3. Understand and use the basics of diffusion in solids (Capability 1.1)
  4. Apply the basics of diffusion to explain phase transformations in solids (Capability 1.1 and 2.1)
  5. Understand and explain the basics of dislocations and the significance of dislocations in metals (Capability 1.1)
  6. Apply dislocation theory to explain how materials are strengthened (Capability 1.1, 2.1 and 3.2)
  7. Understand and describe common phase transformations in steel. (Capability 1.1)
  8. Analyse and select appropriate heat treatment methods to obtain desired properties by using TTT diagrams (Capability 1.1, 2.1, 3.1, 4.1 and 4.2)
  9. Understand and explain mechanical testing and important mechanical property concepts (Capability 1.1)
  10. Evaluate whether a material fails by using fracture mechanics (Capability 1.1 and 2.1)

Assessments

Assessment Type Percentage Classification
Tests 20% Individual Test
Final Exam 50% Individual Examination
Laboratories/reports 30% Individual Coursework
Assessment Type Learning Outcome Addressed
1 2 3 4 5 6 7 8 9 10
Tests
Final Exam
Laboratories/reports

All lab sessions are compulsory. If you fail to complete labs, you fail the entire course, regardless of the achievement on Tests and Exam.

Late submission of lab reports and journals will incur a penalty.

Workload Expectations

This course is a standard [15] point course and students are expected to spend 10 hours per week involved in each 15 point course that they are enrolled in.


Digital Resources

Course materials are made available in a learning and collaboration tool called Canvas which also includes reading lists and lecture recordings (where available).

Please remember that the recording of any class on a personal device requires the permission of the instructor.

Academic Integrity

The University of Auckland will not tolerate cheating, or assisting others to cheat, and views cheating in coursework as a serious academic offence. The work that a student submits for grading must be the student's own work, reflecting their learning. Where work from other sources is used, it must be properly acknowledged and referenced. This requirement also applies to sources on the internet. A student's assessed work may be reviewed against online source material using computerised detection mechanisms.

Learning Continuity

In the event of an unexpected disruption we undertake to maintain the continuity and standard of teaching and learning in all your courses throughout the year. If there are unexpected disruptions the University has contingency plans to ensure that access to your course continues and your assessment is fair, and not compromised. Some adjustments may need to be made in emergencies. You will be kept fully informed by your course co-ordinator, and if disruption occurs you should refer to the University Website for information about how to proceed.

Class Representatives

Class representatives are students tasked with representing student issues to departments, faculties, and the wider university. If you have a complaint about this course, please contact your class rep who will know how to raise it in the right channels. See your departmental noticeboard for contact details for your class reps.

Inclusive Learning

All students are asked to discuss any impairment related requirements privately, face to face and/or in written form with the course coordinator, lecturer or tutor.

Student Disability Services also provides support for students with a wide range of impairments, both visible and invisible, to succeed and excel at the University. For more information and contact details, please visit the Student Disability Services’ website at http://disability.auckland.ac.nz

Special Circumstances

If your ability to complete assessed coursework is affected by illness or other personal circumstances outside of your control, contact a member of teaching staff as soon as possible before the assessment is due.

If your personal circumstances significantly affect your performance, or preparation, for an exam or eligible written test, refer to the University’s aegrotat or compassionate consideration page: https://www.auckland.ac.nz/en/students/academic-information/exams-and-final-results/during-exams/aegrotat-and-compassionate-consideration.html.

This should be done as soon as possible and no later than seven days after the affected test or exam date.

Student Feedback

At the end of every semester students will be invited to give feedback on the course and teaching through a tool called SET or Qualtrics. The lecturers and course co-ordinators will consider all feedback and respond with summaries and actions.

Your feedback helps teachers to improve the course and its delivery for future students.

Class Representatives in each class can take feedback to the department and faculty staff-student consultative committees.

Student Charter and Responsibilities

The Student Charter assumes and acknowledges that students are active participants in the learning process and that they have responsibilities to the institution and the international community of scholars. The University expects that students will act at all times in a way that demonstrates respect for the rights of other students and staff so that the learning environment is both safe and productive. For further information visit Student Charter (https://www.auckland.ac.nz/en/students/forms-policies-and-guidelines/student-policies-and-guidelines/student-charter.html).

Disclaimer

Elements of this outline may be subject to change. The latest information about the course will be available for enrolled students in Canvas.

In this course you may be asked to submit your coursework assessments digitally. The University reserves the right to conduct scheduled tests and examinations for this course online or through the use of computers or other electronic devices. Where tests or examinations are conducted online remote invigilation arrangements may be used. The final decision on the completion mode for a test or examination, and remote invigilation arrangements where applicable, will be advised to students at least 10 days prior to the scheduled date of the assessment, or in the case of an examination when the examination timetable is published.

Published on 14/01/2020 04:52 p.m.