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What is the DBTT (in °C or °F) of 0.11%C Fe-C steel, according to the following...
1.Below are stress-strain curves for 5 steels. (a) annealed low carbon steel, (b) a steel alloy...
1.Below are stress-strain curves for 5 steels. (a) annealed low carbon steel, (b) a steel alloy which has a DBTT of +50°C (c) 304 stainless steel (d) nearly pure coarse grained Fe Identify the modulus, yield stress, tensile strength, ductility, and toughness. Identify the amount of elastic strain at yield stress, tensile strength, point right before fracture, point right after fracture. 2000 -Low C steel, 1800 steel alloy, DBTT +50C 304 stainless pure Fe 1600 1400 1200 t 1000 800...
5. Three steels with a composition of Fe-0.2 wt.% C, Fe-0.76 wt.% C and Fe-1.1 wt.%...
5. Three steels with a composition of Fe-0.2 wt.% C, Fe-0.76 wt.% C and Fe-1.1 wt.% C are produced by melting and slowly cooling down to room temperature. By referring the phase diagram provided in figure 3, what would you expect in terms of phase changes (solidification sequence) in all three alloys as the temperature of the alloys reduces from melting temperature to room temperature? What will be the approximate weight fraction of each of those micro constituents at room...
For tensile testing, six 1018 steel tensile bars were homogenized at 950°C and then each was...
For tensile testing,
six 1018 steel tensile bars were homogenized at 950°C and then each
was subjected to one of the following heat treatments:
water quenching (WQ)
water quenching followed by a 1 hour anneal at 300°C (WQ +
300)
water quenching followed by a 1 hour anneal at 500°C (WQ +
500)
Oil quenching (OQ)
Air cooling (AC)
Furnace cooling (FC)
Carbon Steels: 1019 °C A 800 A A+F 700 6001 A+F+P F+P 500 -Ms TEMPERATURE 400E Mgo M90...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 900 1600...
this is the TTT curve Given a plain carbon steel which has 8 % primary (or...
this is the TTT curve
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. a. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600°C and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown) 800 А Eutectoid temperature 1400...
LOO Etter 700 A certain steel of eutectoid composition transforms according to the isothermal transformation curve...
LOO Etter 700 A certain steel of eutectoid composition transforms according to the isothermal transformation curve shown below. a. Describe a thermal treatment that would result in a structure having 50% pearlite and 25% bainite, and 25% martensite. 1200 1000 Tenger! 500 TO 300 200 00 MASON MO 100 b. Assuming I hold for 105 seconds, what approximate temperature do I need to quench to and hold to get 100% i. Coarse pearlite 200 10 ii. Martensite iii. Bainite
Data Collected During the Charpy Impact Tests Two types of steel specimens (BLUE and RED) were...
Data Collected During the Charpy Impact Tests Two types of steel specimens (BLUE and RED) were used in Charpy testing. The specimens were tested at one of three possible temperatures (-10°F, 32°F or 72°F). Below are the results from this testing. Temperature (°F) 72 72 72 32 32 32 Reading (lb-ft) 191 202 175 25 32 26 32 22 10 12 Type Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Red Red Red Red Red Red Red Red...
4.) a.) What is the cooling rate from 800°C to 500°C for a steel part with 20 % bainite? Method of MCQuoid-Ehn 9%V b.S.-M 10.43 0.41 082 0041 0.015 1.22 004 0.14 0.11 Austenitizing temp. - 880°C Grai...
4.) a.) What is the cooling rate from 800°C to 500°C for a steel part with 20 % bainite? Method of MCQuoid-Ehn 9%V b.S.-M 10.43 0.41 082 0041 0.015 1.22 004 0.14 0.11 Austenitizing temp. - 880°C Grain size (AS 10-11 800 Acs (0.25° min) 700 600 500 Hardness HR 200 90 100 104 10 60 102 min 1 2 468 1624 1 2 34 6 10 b.) What is the room temperature hardness of this steel part? c.) Which...
Phase transformations and microstructural control in Fe-C alloy system (11 marks) 2. For the Fe-C alloy...
Phase transformations and microstructural control in Fe-C alloy system (11 marks) 2. For the Fe-C alloy of eutectoid composition (shown below in the left graph): 800 1100 Austenite Eutectoid temperature 700 1000 y Fe,C 600 900 500 800 00 727 C 700 300 Mistart) 600 Fe C 50% 200 M(50 % ) M190 % ) Fe C 500 100 400 101 104 105 1.0 2.C 10- 10 1 10 Composition (wt % C) Time (s) a) Name the possible types...
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both...
Given a plain carbon steel which has 8 % primary (or pro
eutectoid) carbide, determine both overall carbon content and
ferrite content. Assume that the steel was at equilibrium just
above the eutectoid temperature and then cooled immediately to
600ºC and held for 5 seconds, then quenched. What microconstituents
would there be in the structure and how much of each? (Assume the
cooling behavior follows the TTT curve shown)
800 Eutectoid temperature 1400 700 А 1200 600 1000 500 B...
1.Below are stress-strain curves for 5 steels. (a) annealed low carbon steel, (b) a steel alloy which has a DBTT of +50°C (c) 304 stainless steel (d) nearly pure coarse grained Fe Identify the modulus, yield stress, tensile strength, ductility, and toughness. Identify the amount of elastic strain at yield stress, tensile strength, point right before fracture, point right after fracture. 2000 -Low C steel, 1800 steel alloy, DBTT +50C 304 stainless pure Fe 1600 1400 1200 t 1000 800...
5. Three steels with a composition of Fe-0.2 wt.% C, Fe-0.76 wt.% C and Fe-1.1 wt.% C are produced by melting and slowly cooling down to room temperature. By referring the phase diagram provided in figure 3, what would you expect in terms of phase changes (solidification sequence) in all three alloys as the temperature of the alloys reduces from melting temperature to room temperature? What will be the approximate weight fraction of each of those micro constituents at room...
For tensile testing,
six 1018 steel tensile bars were homogenized at 950°C and then each
was subjected to one of the following heat treatments:
water quenching (WQ)
water quenching followed by a 1 hour anneal at 300°C (WQ +
300)
water quenching followed by a 1 hour anneal at 500°C (WQ +
500)
Oil quenching (OQ)
Air cooling (AC)
Furnace cooling (FC)
Carbon Steels: 1019 °C A 800 A A+F 700 6001 A+F+P F+P 500 -Ms TEMPERATURE 400E Mgo M90...
Using the attached TTT diagram for 1.13 wt% C steel, name the structures present and approximate quantities after the following heat treatments: a) heat to 900°C, quench to 700°C, hold for 10 s, quench to 0°C (the iron-iron carbide phase diagram will help) b) heat to 900°C, quench to 300°C, hold for 1000 s, quench to 0°C c) heat to 900°C, quench to 100°C d) heat to 800°C, quench to 0°C (the iron-iron carbide phase diagram will help) 900 1600...
this is the TTT curve
Given a plain carbon steel which has 8 % primary (or pro eutectoid) carbide, determine both overall carbon content and ferrite content. a. Assume that the steel was at equilibrium just above the eutectoid temperature and then cooled immediately to 600°C and held for 5 seconds, then quenched. What microconstituents would there be in the structure and how much of each? (Assume the cooling behavior follows the TTT curve shown) 800 А Eutectoid temperature 1400...
LOO Etter 700 A certain steel of eutectoid composition transforms according to the isothermal transformation curve shown below. a. Describe a thermal treatment that would result in a structure having 50% pearlite and 25% bainite, and 25% martensite. 1200 1000 Tenger! 500 TO 300 200 00 MASON MO 100 b. Assuming I hold for 105 seconds, what approximate temperature do I need to quench to and hold to get 100% i. Coarse pearlite 200 10 ii. Martensite iii. Bainite
Data Collected During the Charpy Impact Tests Two types of steel specimens (BLUE and RED) were used in Charpy testing. The specimens were tested at one of three possible temperatures (-10°F, 32°F or 72°F). Below are the results from this testing. Temperature (°F) 72 72 72 32 32 32 Reading (lb-ft) 191 202 175 25 32 26 32 22 10 12 Type Blue Blue Blue Blue Blue Blue Blue Blue Blue Blue Red Red Red Red Red Red Red Red...
4.) a.) What is the cooling rate from 800°C to 500°C for a steel part with 20 % bainite? Method of MCQuoid-Ehn 9%V b.S.-M 10.43 0.41 082 0041 0.015 1.22 004 0.14 0.11 Austenitizing temp. - 880°C Grain size (AS 10-11 800 Acs (0.25° min) 700 600 500 Hardness HR 200 90 100 104 10 60 102 min 1 2 468 1624 1 2 34 6 10 b.) What is the room temperature hardness of this steel part? c.) Which...
Phase transformations and microstructural control in Fe-C alloy system (11 marks) 2. For the Fe-C alloy of eutectoid composition (shown below in the left graph): 800 1100 Austenite Eutectoid temperature 700 1000 y Fe,C 600 900 500 800 00 727 C 700 300 Mistart) 600 Fe C 50% 200 M(50 % ) M190 % ) Fe C 500 100 400 101 104 105 1.0 2.C 10- 10 1 10 Composition (wt % C) Time (s) a) Name the possible types...
Given a plain carbon steel which has 8 % primary (or pro
eutectoid) carbide, determine both overall carbon content and
ferrite content. Assume that the steel was at equilibrium just
above the eutectoid temperature and then cooled immediately to
600ºC and held for 5 seconds, then quenched. What microconstituents
would there be in the structure and how much of each? (Assume the
cooling behavior follows the TTT curve shown)
800 Eutectoid temperature 1400 700 А 1200 600 1000 500 B...
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