2)at the point of necking , which of the following is false a)cross sectional area increases...
2)at the point of necking , which of the following is false
a)cross sectional area increases b) strain hardening increases c) strength increases d) strain increases
3)IN a TT DIAGRAM, what material is present in steel at a temperature between 300C and 550 C?
a)perlite b) bainite c) martensite D) AUSTENIte
Homework Answers
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2)at the point of necking , which of the following is false
a)cross sectional area increases...
1) which of the following is true> a) Buckling is a form of failure experienced by...
1) which of the following is true> a) Buckling is a form of failure experienced by ductile materials b) Buckling is a form of failure experienced under commpression c) Buckling is a form of failure experienced under tension d) Buckling is a form of failure experienced by brittle materials e) Buckling lowers the ability of a material to support loads f)buckling is a form of failure experienced by slende columns 2)at the point of necking , which of the following...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products result. a) ferrite and bainite b) ferrite and martensite c) ferrite and pearlite d) pearlite and cementite 8. Pearlite is a combination of a) cementite and iron carbide b) ferrite and cementite c) ferrite and bainite d) ferrite and martensite 9. The process of hardening steel consists of what two steps? a) melting the steel followed by quenching b) melting the steel followed by...
a) Based on time-temperature-transformation (TTT) diagram in Figure 2, briefly explain and label the time-temperature paths...
a) Based on time-temperature-transformation (TTT) diagram in Figure 2, briefly explain and label the time-temperature paths to produce the following microstructures (a), (b), (c). (d), 100% coarse pearlite 50% bainite 50% martensite 50% fine 100% martensite perlite and 50% martensite (10 marks) 800 727 700 Coarse pearlite 600 a + Fe,C Fine pearlite 500 400 300 200 100 1 see I min 1 hour I day 10 102 10) 10s Time, seconds Figure 2: Time-Temperature Transformation (TTT) diagram for eutectoid...
3. Bar AC is rectangular in cross-section and has a cross-sectional area of 0.5 in2. The...
3. Bar AC is rectangular in cross-section and has a cross-sectional area of 0.5 in2. The stress-strain behavior of the material is shown below. Construct the (internal) axial force diagram for Bar AC. Then compute / provide the total deformation in the bar (between A and C) B 8 kip C 5 kip 5 ft a(ksi) 40 20 0.001 0.021 -e (in/in.)
The A992 steel rod is subjected to the loading shown. If the cross-sectional area of the...
The A992 steel rod is
subjected to the loading shown. If the cross-sectional area of the
rod is 100 mm2. Neglect the size of the couplings at B and C. The
elastic modulus and yield stress of A992 steel is 200 GPa and 345
MPa respectively. Determine the displacement of B and A with
respect to point D. (Preserve 2 significant digits after the
decimal point.)
QUESTION 1 The 1992 steel rod is subjected to the loading shown. If the...
Four steel rods each with a cross-sectional area of 1in 2 are embedded in a 5-in...
Four steel rods each with a cross-sectional area of 1in 2 are embedded in a 5-in diameter light aggregate concrete cylinder. The steel has a yield strength of 36000 psi and a modulus of elasticity of 30x10n6 psi. Assume a very strong interface between the steel and the concrete causes them to experience identical deflections. A rigid plate is placed over both ends of the cylinder and a compressive axial force of 100,000 lb is applied. The stress (psi) induced...
a. Relationship between average normal stress and normal load perpendicular to a cross-sectional area b. Relationship...
a. Relationship between average normal stress and normal load perpendicular to a cross-sectional area b. Relationship between average shear stress and shear load in-plane with a cross-sectional area C. Average normal strain along a line on a body, given initial and final line lengths d. Hooke's Law applied to relationship between axial stress and strain e. Hooke's Law applied to relationship between torsional stress and strain f. Poisson's ratio between longitudinal and lateral strains g. Modulus of elasticity of steel...
1. Circle whether the following statements are true (T) or false (F). (2 mark each, total:...
1. Circle whether the following statements are true (T) or false (F). (2 mark each, total: 32) I F Substitutional atoms replace the solvent atoms in a unit cell F F Increasing grain size will increase the yield strength. F Growth of a phase is a thermally activated process. T F Spheroidizing results in coarse precipitates. TF Hot working requires less energy for plastic deformation than cold working F F A eutectoid reaction can be written as: Le Solid 1...
A marble column with a cross-sectional area of 26.00 cm2 supports a load of 7.300 ×...
A marble column with a cross-sectional area of 26.00 cm2 supports a load of 7.300 × 104 N. (Marble: Y = 6.100 × 1010 Pa; compressive strength = 2.200 × 108 Pa.) (a) What is the stress in the column? Pa (b) What is the strain in the column? (c) If the column is 1.400 m high, how much is its length changed by supporting the load? m
In Figure P4.5, member (1) has a cross-sectional area of 0.7 in.2 and a yield strength...
In Figure P4.5, member (1) has
a cross-sectional area of 0.7 in.2 and a yield strength of 50 ksi.
Member (2) has a cross-sectional area of 1.8 in.2 and a yield
strength of 36 ksi. A factor of safety of 1.67 with respect to
yield is required for both members. Use dimensions of a = 60 in., b
= 28 in., c = 54 in., and d = 72 in. Determine the maximum
allowable load P that may be applied...
7. A hypereutectoid steel contains 0.8% C. When slow cooled from austenite the following transformation products result. a) ferrite and bainite b) ferrite and martensite c) ferrite and pearlite d) pearlite and cementite 8. Pearlite is a combination of a) cementite and iron carbide b) ferrite and cementite c) ferrite and bainite d) ferrite and martensite 9. The process of hardening steel consists of what two steps? a) melting the steel followed by quenching b) melting the steel followed by...
a) Based on time-temperature-transformation (TTT) diagram in Figure 2, briefly explain and label the time-temperature paths to produce the following microstructures (a), (b), (c). (d), 100% coarse pearlite 50% bainite 50% martensite 50% fine 100% martensite perlite and 50% martensite (10 marks) 800 727 700 Coarse pearlite 600 a + Fe,C Fine pearlite 500 400 300 200 100 1 see I min 1 hour I day 10 102 10) 10s Time, seconds Figure 2: Time-Temperature Transformation (TTT) diagram for eutectoid...
3. Bar AC is rectangular in cross-section and has a cross-sectional area of 0.5 in2. The stress-strain behavior of the material is shown below. Construct the (internal) axial force diagram for Bar AC. Then compute / provide the total deformation in the bar (between A and C) B 8 kip C 5 kip 5 ft a(ksi) 40 20 0.001 0.021 -e (in/in.)
The A992 steel rod is
subjected to the loading shown. If the cross-sectional area of the
rod is 100 mm2. Neglect the size of the couplings at B and C. The
elastic modulus and yield stress of A992 steel is 200 GPa and 345
MPa respectively. Determine the displacement of B and A with
respect to point D. (Preserve 2 significant digits after the
decimal point.)
QUESTION 1 The 1992 steel rod is subjected to the loading shown. If the...
Four steel rods each with a cross-sectional area of 1in 2 are embedded in a 5-in diameter light aggregate concrete cylinder. The steel has a yield strength of 36000 psi and a modulus of elasticity of 30x10n6 psi. Assume a very strong interface between the steel and the concrete causes them to experience identical deflections. A rigid plate is placed over both ends of the cylinder and a compressive axial force of 100,000 lb is applied. The stress (psi) induced...
a. Relationship between average normal stress and normal load perpendicular to a cross-sectional area b. Relationship between average shear stress and shear load in-plane with a cross-sectional area C. Average normal strain along a line on a body, given initial and final line lengths d. Hooke's Law applied to relationship between axial stress and strain e. Hooke's Law applied to relationship between torsional stress and strain f. Poisson's ratio between longitudinal and lateral strains g. Modulus of elasticity of steel...
1. Circle whether the following statements are true (T) or false (F). (2 mark each, total: 32) I F Substitutional atoms replace the solvent atoms in a unit cell F F Increasing grain size will increase the yield strength. F Growth of a phase is a thermally activated process. T F Spheroidizing results in coarse precipitates. TF Hot working requires less energy for plastic deformation than cold working F F A eutectoid reaction can be written as: Le Solid 1...
In Figure P4.5, member (1) has
a cross-sectional area of 0.7 in.2 and a yield strength of 50 ksi.
Member (2) has a cross-sectional area of 1.8 in.2 and a yield
strength of 36 ksi. A factor of safety of 1.67 with respect to
yield is required for both members. Use dimensions of a = 60 in., b
= 28 in., c = 54 in., and d = 72 in. Determine the maximum
allowable load P that may be applied...
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