Subcritical annealing can be done at lower temperature than full annealing. Select one: True O False
Q: Cold working of metals will give better final properties than hot working. Select one: True False
A: Hot and cold working: Important difference between these processes is hot working is done at high…
Q: 04: A) Consider the engineering stress-strain curves for three materials labeled A, B, and C below.…
A: Strain hardening is phenomena in which the yielding strength of the material increases after the…
Q: We could do strain hardening even if the material starts to have necking. True or false?
A:
Q: The engineering stress and strain are defined relative to the instantaneous area and length of test…
A: At higher temperature, strength and strain hardening is increased whereas ductility is decreased…
Q: 20- Vickers Hardness Number (HV) value is directly proportional to a. Shape of indenter b.…
A:
Q: НOME WORK The figure shows two work pieces of steel of 0.3 %C and 1.3 %C with different dimensions.…
A: For structure 1: The carbon percentage is 0.3% which means it will be more ductile and the structure…
Q: Describe the different methods for determining the allowable creep strengthfor a particular…
A: Creep is the tendency of the material to deform permanently under the influence of the persistent…
Q: explain the differences between recovery and recrystallization processes
A: Recovery and recrystallization processes are the types of forming processes. In recovery, the…
Q: When λ=1.5Å and θ=30°, how much strain (Δd/d) is needed to cause a peak broadening same as that of…
A: This problem is related to Braggs law. if λ is the wavelength of X-ray,d is the distance between…
Q: A hardness of 45 Rc is required for a plain carbon steel containing 0.6% carbon. Can you explain…
A: The hardness of high carbon steel is given as 45 Rc. The carbon steel containing carbon is given as…
Q: Determine the indentation diameter of a mild steel material subjected to a Brinell hardness test…
A:
Q: process which work above recrystallization temperature
A:
Q: Fatigue cracks may happen due to weakening of surface layer in hot working. Select one: True False
A: Given :- Fatigue cracks may happen due to weakening of surface layer in hot working. Select one:…
Q: In the Figure below, the tensile breaking strength, (sigma mark)tenstile-breaking = 140 Mpa…
A: Given: The tensile strength of the material = 140 Mpa The compressive strength of the material = 460…
Q: Which of the following may occur during an annealing heat treatment? (Please choose all that apply)…
A: Annealing Heat treatment: The Annealing process is stated as the heat treatment process in which the…
Q: Subcritical annealing can be done at lower temperature than full annealing. Select one: True False
A:
Q: Why would engineers use Vickers Hardness testing (HV) over Brinell Testing for hardened tool steel…
A: Hardness is the property of the material that can be understand as the resistance to scratch and…
Q: Determine the indentation diameter and the surface area of indentation of a copper material…
A: Given: The test force, P = 8.3 kN The diameter of the steel ball. D = 9 mm The Brinell hardness…
Q: What visual evidence supports the presence of significant grain boundary sliding in many creep…
A: Irregular atomic bed displacement occurred due to grain boundary sliding. These displacements of…
Q: Answe rite the sentence on for 10 only 1- Mn Ni Cr, W, Mo, V are the most important elements that…
A: Given questions: 1. Mn, Ni, Cr, W, Mo, V are the most important elements that form austenite.2.…
Q: (a) Draw two Engineering Stress - Engineering Strain graphs: one for a ductile metal and one for a…
A:
Q: Strain hardening is more visible in _______ process. a. Hot drawing b. Cold rolling c. Hot rolling…
A: Strain hardening is the process in which strain is generated in the metal due to continuous…
Q: B/ what are the mechanisms for creep?
A: As per given Mechanism of creep??
Q: 3000 kg, 10mm Steel Ball Brinell Hardness Reading of 421 is equal to what Rockwell C Reading?
A: Write the given data. m=3000 kgd=10 mmBHN=421
Q: Briefly cite the differences between the recovery and recrystallization processes.
A: Annealing- It isla heat treatment process in which the steel is heated to 50-100°C above austenitic…
Q: 2) Which of the following statement(s) is/are correct? i. In hot working, distorted grain structure…
A: In hot working generally recrystallization take place and recrystallization is the process of…
Q: 1) When a component is under constant stress at a temperature higher than room temperature, it may…
A: It is required to choose correct option for given question
Q: AISI 4130 Annealed at 865°C The tensile and yield strengths of the material are MPa and MPa,…
A: The following properties are taken from property table for AISI 4130 Annealed at 865 deg C.
Q: Consider the tensile stress strain curves in Figure 8-20 labeled 1 and 2 and answer the following…
A: (a) Work hardening is a process used in order to increase the hardness of the workpiece by…
Q: A sheet of a 70% Cu-30% Zn alloy is cold-rolled 20% to a thickness of 3.0mm. The sheet is then…
A:
Q: Subcritical annealing can be done at higher temperature than full annealing.
A: In the given statement, it is mentioned that subcritical annealing can be done at higher temperature…
Q: Question 6 Define the recrystallization temperature and explain its effects on the properties of…
A:
Q: 1. List at least 5 types of forming operations that are used to shape metals into functional shapes.…
A: 1) Rolling:In the rolling process, metal plates are pushed between a combination of two or three…
Q: HOME WORK 1 The figure shows two work pieces of steel of 0.3 %C and 1.3 %C with different…
A: If the annealing process is carried out at controlled heating and cooling rates, Size will not…
Q: For cast iron components, subjected to steady loading which of the following strength is considered…
A: It is also known that brittle materials do not show yield points under the application of tensile…
Q: Increasing the degree of graphite nodularity produces an improvement in cast iron elongation, due to…
A: 1. Increasing the degree of graphite nodularity produces an improvement in cast iron elongation due…
Q: Q3/ A-Define the following: Duplex stainless steel, Super alloy, Martinsite, Muntiz metal, Flam…
A: A. Duplex Stainless Steel - These are formed due the combination of ferritic and austenitic steel.…
Q: Subcritical annealing can be done at lower temperature than full annealing. Select one: O True O…
A:
Q: Briefly describe the metallographic procedure. Briefly explain the ASTM grain-size standard. Draw a…
A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…
Q: What is the effect of solid solution strengthening on Tensile strength (TS) and Ductility (%EL,%AR)?
A: Solid solution strengthening is alloying base metal by adding alloying elements. This creates stress…
Q: In the Figure below, the tensile breaking strength, (sigma mark)tenstile-breaking = 140 ???…
A: Given: The tensile strength = 140 Mpa The compressive strength = 460 MPa The force = 25 kN The…
Q: Question 4. (а) Draw and annotate the stress-strain curve for a typical metal. Describe how you…
A:
Q: Hot working of metals can be done at below recrystallization temperature. Select one: True False
A: Forming operation on metals can be done broadly in two ways: Hot working Cold working
Q: What is a consequence of strain hardening?
A: Consequence of strain hardening
Q: Cold working of a metal results in: (This question has only one correct answer) а. Increased…
A: Ans d. Higher yield strength After cold working yield strength of material increased ,this is due to…
Step by step
Solved in 2 steps
- Subcritical annealing can be done at higher temperature than full annealing. Select one: True False4/ Hot working of metals can be done at below recrystallization temperature. Select one: True FalseIdentify the mold die material in order to produce the steel casting parts. Steel Cast iron Graphite Wood Full annealing can be done at lower temperature than the subcritical annealing. Select one: True False
- What properties can annealing produce in metals?Q1: Austenitized 40 mm diameter 5140 alloy steel bar is quenched in agitated oil. Predict what is the Rockwell hardness of this bar will be at (a) its surface and (b) its center (c) What do you think about the difference in hardness number between the center and surface (d) Differentiate between hardness and hardenability (e) Rank the steels in the figure below from lowest to highest hardenability and explain why. 600- Bar diameter (mm) 100 80 60 40 20 0 300 0 Cooling rate at 700°C (°C/sec). -150 55 0 تنا 25 ------- 5 S 10 12.5 8 M-R L 1/2 34-R Agitated oil 15 20 ¼ ¾ Distance from quenched end. De (Jominy distance) 5,5 54 Car Bar diameter (in.) 0 25 mm. 1 in. Hardness (Rockwell C) Where (C = center, S = surface, M-R = mid-radius) 2828 292 65 60- 55- 50 45 40 35 30 25 20 15 10 0 J 10 5140 30 20 Distance from quenched end (mm) 4340 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 Distance from quenched end (sixteenths of an inch) 40 9840 4140 8640 50Austentitic stainless steel's are not hardenable by cold working however Austentic stainless steel's can be strengthened by heat treatment true or false?
- Q4: Answer with True or False: 1-Cooling rate when quenching steel in agitated water is faster than brine. 2-Normalizing can be done for hypereutectoid steels by heating the steel above Acm. 3-Marquenching of the hardened steel sometimes causes quench cracks. 4-New carbides type begins to form after tempering AISI 1020 steel after 100°C. 5-Recrystallization temperature decreases with increasing the percentage of prior cold work. 6-Steels are categorized depending on their microstructure and how they've been heat treated. 7-Annihilation of dislocations, polygonization is commercially done by recrystallization annealing 8-Process annealing for cold worked for AISI 1040 steel includes heating the steel to 650°C. 9-Carbon content increases martensite start and finish temperatures. 10-Retained austenite is more at center than surface of a quenched part.36 Asiacell O Homework 4 -... -> 3 Class Materials Eng. Dep. Heat Treatment Ismail Ibrahim Marhoon Homework 4 Q1: 1.5 in diameter steel part is quenched in oil with no agitation. (H=0.20). If we use a 4340; 4140; 8640; 5140; 1040 steel, what would be the hardness number at the center of the part? Q2: Determine the best quenching medium to produce a minimum hardness of HRC 40 at the center of a 3.75 cm diameter 4320 steel bar. Given Cingrate t 00c00 143 to 4340 50 40 8640 ab 9310 30 4320 1050 1040 10 20 it 1 1 2n 10 20 30 Jominy distance th of an inch) Die he eted e TABLE The N canticient, or seveity of the querch, far several guenehing sedla H Coefticient Coaling Rate at he Center of a l-in. Bar (CA) Medium Ol no taton) 04 anitation) 025 18 45 HyD inc agtation H0 fegiutont Brine Ino agtaton) Brine lapttiori 10 4.0 190 20 60 90 230 Ad DISTANCE FROM OUENCHED END IN) DIAMETER IN)1-llustrate the process which work above recrystallization temperature with neat sketch?
- Q3] A. What are annealing purposes? B. Calculate the upper and lower critical temperature for steel composition as follow: %C %Si %Mn %P %S %Cr %Mo %Fe 0.15 1.00 0.60 0.025 0.025 9. 1.10 balanceA through hardened gear is to be made with steel (4340) is to be used in an application requiring a minimum tensilestrength of 1514.5 MPa and a minimum ductility of 39.5%RA. Oil quenching followed by tempering is to be used. Brieflydescribe the tempering heat treatment.Explain the use of TTT/Phase diagram and combination of phasesHeating the metal above recrystallization temperature and then sudden cooling by dipping in water is known as quenching. Select one: True False