Course:
MMET 207
Institution:
MMET 207
MMET 207 FINAL REVIEW ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Stainless Steels - Answer -Alloys of Fe, Cr, and other elements that resist corrosion The minmum amount is 11.5%Cr for stainless steels (Increasing Cr) = (Decreases Corrosion) ...
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| Uploaded on: | October 31, 2025 |
| Last updated: | November 17, 2025 |
| Number of pages: | 110 |
| Written in: | 2025/2026 |
| Type: | Exam (elaborations) |
| Contains: | Questions & Answers |
| Tags: | MMET 207 FINAL REVIEW ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Stainless Steels - Answer -Alloys of Fe, Cr, and other elements that resist corrosion The minmum amount is 11.5%Cr for stainless steels (Increasing Cr) = (Decreases Corrosion) Much Exhibit Passivity Stainless Steels (3 Types) - Answer -- Ferritic - Martensitic - Austenitic |
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MMET 207 FINAL REVIEW ACTUAL 2025/2026 QUESTIONS AND 100% CORRECT ANSWERS Stainless Steels - Answer -Alloys of Fe, Cr, and other elements that resist corrosion The minmum amount is 11.5%Cr for stainless steels (Increasing Cr) = (Decreases Corrosion) Much Exhibit Passivity Stainless Steels (3 Types) - Answer -- Ferritic - Martensitic - Austenitic Sigma Phase - Answer -- a hard brittle compound of 50 atomic % Fe and 50 atomic % Cr - It is an undesirable phase, reduces corrosion resistance, lowers mechanical properties - limiting factor of Cr Ferritic Steels - structure - carbon contents - chromium contents - hardenable - weldability and notch sensitivity - magnetic? - other props - Answer -- BCC Structure Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com - Normally less than 0.2% C - Cr contents (16 - 20%) - Non-Hardenable (cannot form martensite through heat treating) - Poor Weldability and Notch Sensitivity - Magnetic (Ferrite) - Excellent Corrosion Resistance in Seawater - Not very susceptible to stress corrosion cracking Applications of Ferritic Steels - Answer -- Atmospheric Corrosion - Elevated Temperatures - Decorative Applications Notch Sensitivity - Answer -The extent to which the sensitivity of a material to fracture is increased by the presence of a surface inhomogeneity such as a notch, a sudden change in section, a crack, or a scratch What does adding more Cr and N do to the ternary diagram? - Answer -Expands the gamma loop Martensitic Steels - structure - carbon contents - chromium contents - hardenable - weldability and notch sensitivity - magnetic? - other props - Answer -- BCT Structure - High Carbon (up to 1.2%) - Cr content (12 - 18%) - Hardenable - Poor Weldability and Notch Sensitivity - Magnetic - Cr Carbides (Holds Edges) Need assistance on Online classes, Exams & Assignments? Reach out for instant help!! Full Course Assistance, Plagiarism-free Essay Writing, Research Paper, Dissertation, Discussion Posts, etc…. Confidential & Secure services. Tutors are available for all subjects! Email now at: tutorjean01@gmail.com
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