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Dura Total: 75 points initial diameter of 25.1 mm is to be cold worked by drawing...
A cylindrical rod of 1040 steel having originally 11.4 mm in diameter is cold-worked by drawing...
A cylindrical rod of 1040 steel having originally 11.4 mm in diameter is cold-worked by drawing (i.e. pulling through a die with a hole smaller than the original rod cross section). The circular cross section will be maintained during deformation. The deformed steel is desired to have tensile strength in excess of 825 MPa and ductility of at least 12% EL. The final diameter must be 8.9 mm. Explain how this may be accomplished.
A cylindrical rod of copper having an initial diameter of 16 mm is to be cold worked by drawing such that the cross-sectional area is reduced. It is required to have a cold-worked yield stress of at...
A cylindrical rod of copper having an initial diameter of 16 mm is to be cold worked by drawing such that the cross-sectional area is reduced. It is required to have a cold-worked yield stress of at least 200 MPa and a ductility in excess of 12%; in addition, the final diameter of 11.3 mm is required. Describe the manner in which this procedure may carried out by answering: (10p) Write the yield strength and ductility before cold work. (15p)...
A cylindrical specimen of a cold-worked brass has a ductility (%EL) of 33%. If its cold-worked...
A cylindrical specimen of a cold-worked brass has a ductility
(%EL) of 33%. If its cold-worked radius is 11 mm, what was its
radius before deformation? You may need to use Animated Figure
7.19c.
Percent cold work = 0 Ductility = 0 Ductility (%EL) Brass 1040 Steel Copper 10 60 70 20 30 40 50 Percent cold work
4. (a) What is cold work and its significance in material properties. (b) Briefly explain why...
4. (a) What is cold work and its significance in material properties. (b) Briefly explain why cold-worked metals are more susceptible to corrosion than noncold-worked metals. (c) A cylindrical rod of 1040 steel originally 15.2 mm in diameter is to be cold worked by drawing; the circular cross section will be maintained during deformation. A cold-worked tensile strength in excess of 840 MPa was applied. Determine the percent cold work if the final diameter must be 10 mm. [20 pts]
Summer 2 Name: Question 3: (10 points) A cylindrical specimen of cold-worked copper has ductility (%EL)...
Summer 2 Name: Question 3: (10 points) A cylindrical specimen of cold-worked copper has ductility (%EL) of 30%. (a) If its cold worked radius is 6.4 mm, what was its radius before deformation? (b)What are its tensile and yield strengths? 140 120 800 900 1040 Steel 1040 S 700 800 100 120 600 a700 80 100 E 500 600 400 Br Brass 500 300 Capper 40 400 200 Capper 300 20 100 200 10 20 30 40 50 70 10...
this all of it !!! 4. Two previously undeformed specimens of the same metal are to...
this all of it !!!
4. Two previously undeformed specimens of the same metal are to be plastically deformed by reducing their cross-sectional areas. One has a circular cross section, and the other is rectangular during deformation the circular cross section is to remain circular, and the rectangular is to remain as such. Their original and deformed dimensions are as follows: Rectangular (mm) Circular (diameter, mm) 125x 175 15.2 Original dimensions 7.5x 200 Deformed dimensions 11.4 Which of these specimens...
A cylindrical car component with 7 mm diameter is to be manufactured. The component is required...
A cylindrical car component with 7 mm diameter is to be manufactured. The component is required to possess a yield strength of at least 700 MPa and an elongation to fracture of at least 11%. For this purpose, you use a cylindrical steel 1040 rod with an initial diameter of 9 mm. The percent cold work cannot exceed 40% during any single cold deformation step in order to avoid cracking. Using the diagram below, describe your manufacturing procedure for this...
040 Stee 0 0 400 600 0 0 200 400 600 Percent cold Percent cold 4....
040 Stee 0 0 400 600 0 0 200 400 600 Percent cold Percent cold 4. (20 points) Suppose that you work for a company that manufactures 1040 steel wire. A customer asks for 1 mm diameter 1040 steel wire with a yield strength of at least 700 MPa and a ductility of at least 12% elongation. Your warehouse is out of this material, but has a large amount of 1.5 mm diameter fully annealed 1040 steel wire, and you...
Question 4: A cylindrical specimen of cold-worked copper has a ductility (%EL) of 25% What is its tensile strength? (a...
Question 4: A cylindrical specimen of cold-worked copper has a ductility (%EL) of 25% What is its tensile strength? (a) (b) If its cold-worked radius is 10 mm, what was its radius before deformation? 70 140 120 900 800 1040 Steel 60 120 1040 Stee 800 700 100 50 700 600 100 80 40 600 500 Brass Brass 80 30 60 400 500 Brass 20 Copper 40 300 60 400 Copper 10 1040 Stee 200 300 40 20 Copper 100...
Problem 1 (10 pts) It is required to manufacture a 2.5 mm diameter copper rod from...
Problem 1 (10 pts) It is required to manufacture a 2.5 mm diameter copper rod from larger diameter stock by drawing. The rod should have a tensile strength of 300 MPa or more, a yield strength of 200 MPa or more, and ductility of 10% or more. Determine (a) the range of%CW which will allow achieving those properties, and (b) within this range clearly pick a certain%CW and determine the corresponding diameter of the starting stock. yield strength (MPa) tensile...
A cylindrical specimen of a cold-worked brass has a ductility
(%EL) of 33%. If its cold-worked radius is 11 mm, what was its
radius before deformation? You may need to use Animated Figure
7.19c.
Percent cold work = 0 Ductility = 0 Ductility (%EL) Brass 1040 Steel Copper 10 60 70 20 30 40 50 Percent cold work
4. (a) What is cold work and its significance in material properties. (b) Briefly explain why cold-worked metals are more susceptible to corrosion than noncold-worked metals. (c) A cylindrical rod of 1040 steel originally 15.2 mm in diameter is to be cold worked by drawing; the circular cross section will be maintained during deformation. A cold-worked tensile strength in excess of 840 MPa was applied. Determine the percent cold work if the final diameter must be 10 mm. [20 pts]
Summer 2 Name: Question 3: (10 points) A cylindrical specimen of cold-worked copper has ductility (%EL) of 30%. (a) If its cold worked radius is 6.4 mm, what was its radius before deformation? (b)What are its tensile and yield strengths? 140 120 800 900 1040 Steel 1040 S 700 800 100 120 600 a700 80 100 E 500 600 400 Br Brass 500 300 Capper 40 400 200 Capper 300 20 100 200 10 20 30 40 50 70 10...
this all of it !!!
4. Two previously undeformed specimens of the same metal are to be plastically deformed by reducing their cross-sectional areas. One has a circular cross section, and the other is rectangular during deformation the circular cross section is to remain circular, and the rectangular is to remain as such. Their original and deformed dimensions are as follows: Rectangular (mm) Circular (diameter, mm) 125x 175 15.2 Original dimensions 7.5x 200 Deformed dimensions 11.4 Which of these specimens...
A cylindrical car component with 7 mm diameter is to be manufactured. The component is required to possess a yield strength of at least 700 MPa and an elongation to fracture of at least 11%. For this purpose, you use a cylindrical steel 1040 rod with an initial diameter of 9 mm. The percent cold work cannot exceed 40% during any single cold deformation step in order to avoid cracking. Using the diagram below, describe your manufacturing procedure for this...
040 Stee 0 0 400 600 0 0 200 400 600 Percent cold Percent cold 4. (20 points) Suppose that you work for a company that manufactures 1040 steel wire. A customer asks for 1 mm diameter 1040 steel wire with a yield strength of at least 700 MPa and a ductility of at least 12% elongation. Your warehouse is out of this material, but has a large amount of 1.5 mm diameter fully annealed 1040 steel wire, and you...
Question 4: A cylindrical specimen of cold-worked copper has a ductility (%EL) of 25% What is its tensile strength? (a) (b) If its cold-worked radius is 10 mm, what was its radius before deformation? 70 140 120 900 800 1040 Steel 60 120 1040 Stee 800 700 100 50 700 600 100 80 40 600 500 Brass Brass 80 30 60 400 500 Brass 20 Copper 40 300 60 400 Copper 10 1040 Stee 200 300 40 20 Copper 100...
Problem 1 (10 pts) It is required to manufacture a 2.5 mm diameter copper rod from larger diameter stock by drawing. The rod should have a tensile strength of 300 MPa or more, a yield strength of 200 MPa or more, and ductility of 10% or more. Determine (a) the range of%CW which will allow achieving those properties, and (b) within this range clearly pick a certain%CW and determine the corresponding diameter of the starting stock. yield strength (MPa) tensile...
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