Chapter 15 Review Questions Ferrous Metals (1)

High strength low alloy (HSLA) steels were originally developed to reduce the weight of automobiles. These steels have higher mechanical properties than the low-carbon steels that they replaced.  True  False Composite materials are composed of two or more different materials that act together to produce properties that are different from, and superior to those of the individual components.  True  False There are several methods for classifying tool steels; they are: according to the quenching media used, according to alloy content, and according to application. true false Addition polymerization, also referred to as cross-linked polymerization, is a process capable of forming long chains of molecules as well as forming bonds between or across chains; the chains of molecules are cross-linked.  True  False The aluminum alloy designated as 5056-H28 means the following: this is a non-heat-treatable alloy of aluminum and magnesium, that has not been modified where 56 represents…

When performing a quench to cool a product, the quench rate affects the outcome of the process. TRUE OR FALSE:    3 principal driving forces for the development of mechanical properties during heat treatment. Group of answer choices Microstructure Changes Formation of Surface Oxide Cooling Rate Ambient Temperature Heating Rate Diffusion Rate Heating Method

Tempering is a heat treatment applied to hardened steels that is best defined as which of the following (one correct answer): O heating and soaking at a temperature above the austenitizing level followed by rapid cooling O heating and soaking at a temperature above the austenitizing level followed by slow cooling O heating and soaking at a temperature below the austenitizing level followed by rapid cooling O heating and soaking at a temperature below the austenitizing level followed by slow cooling

2. Thin pieces of .25 mm thick strips of 1080 steel are heat treated in the following ways. Determine the microstructure of the steel samples after each treatment: a.) Heat for 1 hour to 875°C; salt water-quench. b.) Heat for 1 hour to 875°C; quench in molten salt to 300°C and hold 1 hour; air cool. c.) Heat for 1 hour to 875°C; quench in molten salt to 700°C and hold 2 hours; water quench. d.) Heat for 1 hour to 875°C; water-quench; reheat for 1 hour at 700°C; air cool. e.) Heat for 1 hour to 875°C; quench in molten salt to 600°C and hold 2 seconds; water quench.

5. The table below lists the yield strength, tensile strength, and ductility of pure copper and of a number of copper-based alloys (all materials in the annealed condition).a) How does the addition of impurity atoms to copper affect each of these properties? Which property appears to be most affected (on a percentage change basis)?

9. Typical microscopic images of spheroidite, lower bainite and tempered martensite of an iron-carbon alloy are represented in the following images; 9.a) Briefly describe the microstructural difference between spheroidite and tempered martensite. 9.b) Explain why tempered martensite is much harder and stronger. 9.c) Briefly describe the microstructural difference between lower bainite and tempered martensite. Ferrite Cementite Do 05 μη lower bainite - carbides 0.5 μm tempred martensite - carbides in multiple directions 60 μη oriented in the same direction

Which of the following describes the crystal structure of steel? Group of answer choices Steel is a iron-carbon alloy with carbon creating a vacancy crystal defect resulting in decreased hardness compared to pure iron. Steel is a iron-carbon alloy with carbon as an substitutional crystal defect resulting in decreased hardness compared to pure iron. Steel is a iron-carbon alloy with carbon as an interstitial crystal defect resulting in decreased hardness compared to pure iron. Steel is a iron-carbon alloy with carbon creating a vacancy crystal defect resulting in increased hardness compared to pure iron. Steel is a iron-carbon alloy with carbon as an interstitial crystal defect resulting in increased hardness compared to pure iron. Steel is a iron-carbon alloy with carbon as an substitutional crystal defect resulting in increased hardness compared to pure iron.

Can someone please help me to answer all of the following questions. PLEASE AND THANK YOU!!!!

We wish to produce an 0.3 inch plate of oxygen-free, high-conductivity (OFHC) copper that has a yield strength of at least 45 ksi and elongation of at least 10%.  The original thickness of the plate is 3 inches.  The width of the plate remains the same during processing.  Which of the following procedures would give the correct final properties.  More than one answer is possible.   Group of answer choices Hot work from 3 to 0.5 inches; cold work from 0.5 to 0.3 inches Cold work from 3 to 1 inch; cold work from 1 to 0.5 inches; hot work from 0.5 to 0.3 inches Cold work from 3 to 1 inch; cold work from 1 to 0.4 inches; cold work from 0.4 to 0.3 inches Cold work from 3 to 1 inch; do full anneal; cold work from 1 to 0.5 inches; do full anneal; cold work from 0.5 to 0.3 inches Hot work from 3 to 0.4 inches; cold work from 0.4 to 0.3 inches None of the above will work Cold work from 3 to 0.3 inches Cold work from 3 to 1 inch; hot work from 1 to 0.4 inches; cold work from 0.4…

7. Which of the following statements is suitable to describe the mechanical properties of low carbon steels and high carbon steels without cold working treatment? (a) Low carbon steels containing ferrite and pearlite phases generally have lower tensile strength than high carbon steels. (b) Low carbon steels containing cementite and pearlite phases generally have lower hardness than high carbon steels. (c) Low carbon steels containing ferrite and cementite phases generally have higher ductility and higher hardness than high carbon steels. (d) Low carbon steels are generally less stiff than aluminum alloy.

For each question, provide an explanation, identifying the correct choice ( it is marked in red)  and explaining why it's the right answer, as well as why the other options are incorrect. Please do all three

Can someone please answer these questions and all remaining sub questions please and thank you I really appreciate it a lot. I will upvote if all are answered please and thank you!!

Consider a high-strength advanced titanium blade to be used in a bespoke engine in a test research power plant. What kind of metal production technique would be best suited for manufacturing it? Select one: a. Continuous casting b. Die casting c. Investment casting d. Welding

Copper and copper alloys as specified by the Copper Development Association (CDA) and are designated as C00001 thru C99999 in the Unified Numbering System (UNS).  True  False An alloy steel designated as AISI 4130 WQT 700 means: chromium-molybdenum alloy steel containing .30% carbon in solution, that is through heat treated and water quenched.  True  False An AISI 4340 alloy steel contains .43 percent or 43 points of the element carbon in solution.  True  False Chemicals from which the commercially important plastic resins are derived are themselves derived from natural products that are quite plentiful; these raw materials include coal, water, limestone, sulfur, salt, and petroleum.  True  False There are two (2) types of polymerization; addition or linear and cross-linked or condensation. Addition polymers are thermoplastics and cross-linked polymers are thermosetting materials.  True  False