- Study guides, Class notes & Summaries

MMET 207 EXAM 3 QUESTIONS & ANSWERS

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11 pages

Written in 2024/2025

Grade A+

GEEKA

MMET 207 EXAM 2 REVIEW QUESTIONS

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4 pages

Written in 2024/2025

Grade A+

GEEKA

MMET 207 EXAM 1 QUESTIONS AND ANSWERS

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17 pages

Written in 2024/2025

Grade A+

GEEKA

What is the safety in Hardening? correct answers Most of the impact is in one concentrated area when using a power hammer, most heat elements involved are maneuvered with tech so it very hard to get injured. What are eutectic structures, and eutectic networks? What is severe banding? Why are these undesirable? correct answers Eutectic structures are materials with a single phase melting point, Banding consists of alternating microstructure lines that are parallel during a cold roll, and all o...

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6 pages

Written in 2024/2025

Grade A+

SirAnton

Stress correct answers force divided by area; calculate at each measurement interval Strain correct answers (Final length - Original length) / Original length Modulus of Elasticity correct answers Stress/Strain in straight line portion of graph; can't calculate when graph isn't straight Percent Elongation correct answers final strain x 100% Stress is on which axis? correct answers Y axis Strain is on which axis? correct answers X axis Proportional limit correct answers wh...

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5 pages

Written in 2024/2025

Grade A+

SirAnton

What is the reason for hardness testing? correct answers to measure a metal's resistance to indentation What are the three methods of hardness testing? correct answers Rockwell, Brinell, and Vickers What is the minor load for the regular scale? correct answers 10 kg What is the minor load for the superficial scale? correct answers 3 kg What are the major loads for regular scale Rockwell? correct answers 60 kg, 100 kg, and 150kg What are the major loads for superficial scale Roc...

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5 pages

Written in 2024/2025

Grade A+

SirAnton

Tensile Testing Procedure correct answers 1) Secure a tensile test specimen from your instructor 2) Stamp a set of indentation marks on the specimen using the gagelength, two-prong indentor 3) Place the tensile specimen in the machine with the load gage set on the 60,000 pound scale. Make sure that the scale is zeroed 4) Load the machine until the dial reads 11,000 pounds. Measure the distance between the indentation marks with the dividers and vernier calipers. Record load ad calculate for s...

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8 pages

Written in 2024/2025

Grade A+

SirAnton

Mechanical Properties of Steel correct answers Strength, Formability, Stiffness, Toughness, Durability Types of Strengths correct answers tensile Strength, yield strength, compression, flexural, shear, creep, stress rupture Types of Formability correct answers percent elongation, percent reduction in area, bend radius Types of Stiffness correct answers modulus of elasticity, flexural modulus, shear modulus Types of Toughness correct answers impact strength, notch strength, critical s...

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13 pages

Written in 2024/2025

Grade A+

SirAnton

Stainless Steels correct answers 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) correct answers - Ferritic - Martensitic - Austenitic Sigma Phase correct answers - a hard brittle compound of 50 atomic % Fe and 50 atomic % Cr - It is an undesirable phase, reduces corrosion resistance, lowers mechanical properties - limiting f...

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36 pages

Written in 2024/2025

Grade A+

SirAnton

Types of Hardness Testing (3) correct answers Rockwell, Brinell, Vickers or Knoop Can FCC or BCC hold more carbon? correct answers FCC Are Hardness Rockwell B (HRB) and Hardness Brinell (HB) the same or different tests? correct answers Different (more/less) ___ grains = ____ ductility = ____ slip correct answers smaller grains = more ductility = more slip vice versa (higher/lower) ___ temp --> ___ grain size correct answers higher temp --> larger grins size (higher/lower...

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36 pages

Written in 2024/2025

Grade A+

SirAnton

Bainite is a mixture of needles of carbide and austenite. correct answers False The hardness of martensite goes down gradually during tempering at room temperature subsequent to quenching. correct answers False Higher the tempering temperature, smaller is the tempering time needed. correct answers True Banite is tougher and harder than pearlite. correct answers True Tempering increases the hardness of quenched steels. correct answers False Steel refining means making steel from pi...

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10 pages

Written in 2024/2025

Grade A+

SirAnton

Heat Treating correct answers Changing the steels microstructure, which alters its mechanical properties such as hardness, strength, ductility, and toughness. Phases: correct answers 1. Ferrite- A soft, ductile BCC phases 2. Austenite- A FCC that can dissolve more carbon Transformation correct answers When steel is heated, it can transform from ferrite -> austenite. Upon cooling it can transform back to ferrite, form carbides or form intermediate phases. Carbon Solubility correct an...

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8 pages

Written in 2024/2025

Grade A+

SirAnton

Casting Design correct answers -Wrought steels evolved from cast ingots -Sharp edges are normally bad -want to make molten metal flow easier Mechanism of Solidification correct answers -Grains are formed on solidification by atoms attaching themselves to one another to from "dendrites" -When metals solidify, the first solid to solidify is purer than the last Dendrites correct answers Dont want columnar (coarse grains), want equix spiky things growing off of mold 3 Major things...

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9 pages

Written in 2024/2025

Grade A+

SirAnton

Define Characteristics: Carbon Steels correct answers Major strengthening agent is carbon Can have other elements Largest fraction of steel production Define Characteristics: High-Strength Low Alloy Steels correct answers Designed to increase strength Reduce dimensions What can be classified as an alloy steels? correct answers Total alloy content below 5% Why are there so many different types of steels? correct answers Lots of applications require different mechanical/physical proper...

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13 pages

Written in 2024/2025

Grade A+

SirAnton

What is limestone used for correct answers acts as flux (purifier) that removes impuritites Coke correct answers Used as a heat source to deoxidize; reduces gases that will detach from the oxygen Blast Furnace is charged with... correct answers Iron ore, Coke, Limestone Blast Furnace Process correct answers Heat melts iron Limestone forms slag Slag and metal separate Liquid is poured into molds, *makes pig iron* Pig Iron correct answers Good for being made into steel 3-5% C Weak...

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4 pages

Written in 2024/2025

Grade A+

SirAnton

What are the three categories under which material properties can fall under? correct answers Chemical, Mechanical, Physical Define composition. correct answers Element in weight percentage Define Microstructure. correct answers Arrangement of atoms creating micro component of the metal Define Grain Size. correct answers The dimension of one type of microcomponent Define Inclusions. correct answers Something in the metal that is not metal, usually as a result of refining or welding ...

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17 pages

Written in 2024/2025

Grade A+

SirAnton

1000 Al correct answers commercially pure aluminum (99% minimum) 2000 Al correct answers copper 3000 Al correct answers manganese 4000 Al correct answers silicon 5000 Al correct answers magnesium 6000 Al correct answers magnesium and silicon 7000 Al correct answers zinc 7000-F correct answers zinc; as fabricated 4000-W correct answers silicon; solution heat treated 3000-O correct answers manganese; annealed 5000-H12 correct answers magnesium; 1/4 strain hardened ...

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8 pages

Written in 2024/2025

Grade A+

SirAnton

Ferritic Stainless Steels Numbering System: correct answers 430-Basic Type 17% Cr (less tensile strength) 430F-S added for easier machining (less tensile strength) 446- Cr added for much higher Scaling (Corrosion) resistance (low impact strength) Martensitic Stainless Steels Numbering System: correct answers 403-12% Cr 416-S added for easier machining 420-C added for cutting purposes 440C (high Carbon Content)-wear resistance- good tensile strength-high yield strength (low percent elonga...

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9 pages

Written in 2024/2025

Grade A+

SirAnton

What are the techiques for corrosion control: Design correct answers Crevice control No metal mixes Corrosion allowace Anodic protection Cathodic protection Welding Practice Stagnant Areas Hot spots What are the techniques for corrosion control: Environment control correct answers pH Temperature Velocity Concentration Inhibitors Cleaning Aeration What are the techniques for corrosion control: Material selection correct answers Coatings Cladding Heat treatment Diffusion tr...

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13 pages

Written in 2024/2025

Grade A+

SirAnton

Austenitic stainless steels can be hardened by heat treatment, cold worked or both to improve tensile strength and hardness. correct answers True Graphite flakes can be seen in the surface of unetched gray cast irons correct answers True An increase in the number of graphite flakes in gray cast irons corresponds to: correct answers An increase in castability Cast steels have higher mechanical properties than all of the cast irons except grey cast iron. correct answers False What is a...

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3 pages

Written in 2024/2025

Grade A+

SirAnton