代写MCEN90014 Materials Engineering调试R语言
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ASSIGNMENT – Thermo-Calc
Background
Austenitic stainless steels are used in a wide range of different industries, including food processing, construction, automotive, aerospace, and medical implants. Stainless steels are commonly found in medical implants, such as orthopaedics and dentistry. They are often chosen for medical applications due to their superior properties including corrosion resistance and strength and low cost. These metals consist of austenite phase with face-centered cubic (FCC) crystal structures.
The objective of this assignment is to explore the computational design of a novel austenitic alloy based on the Fe-C-Cr system, targeted for use in medical implants. Note that the corrosion resistance in austenitic steels is assumed to increase linearly with the concentration of Cr, whereas the yield strength can be enhanced by solution hardening. The final properties of the implant (i.e., after cold formed into the required shape) will be achieved by annealing at 1100 °C for 2 hrs and cooling to room temperature rapidly.
Key Thermo-Calc Features to Use:
· Equilibrium phase diagrams
· FEDEMO database (Thermo-Calc Fe-alloys)
· Property models
Hint: Rapid cooling is often used to maintain microstructures achieved at high temperatures.
Report Discussion Points
Your technical report should be approximately 1000 words excluding figures and references. You may outline of the design process, and answers to the following questions:
1. Identify the design objectives and design variables for the proposed product. (2.5 marks)
2. Based on the suggested processing technique (annealing), state the structural constraints to achieve the final properties. (2.5 marks)
3. By using Thermo-Calc:
o Calculate phase diagrams for Fe-C-Cr alloy. (2.5 marks)
o Determine phase stability at processing temperatures. (2.5 marks)
o Optimize Cr and C contents to achieve the targeted properties and justification. (10 marks)
Your report should be professionally written with introduction, objectives, experimental materials and procedures, results and analysis, discussion, conclusions, and a list of references in the APA style. Additional details for report writing are available on LMS.
Submission
You will be required to submit your technical report on Canvas/LMS. The deadline for submission is on May 30th at 12pm.
Late submission will lose 10% per late day. This includes being 5 mins or 1 hour late after the submission deadline.