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it is deformation below recrystalization temperature.
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∙ 12y ago
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Why plastic deformation important in metal not in ceramics?
Plastic deformation in metal causes it to change shape, usually under stress such as a spinning turbine vane. Ceramics cannot deform, they are too hard and would shatter.
Difference between elastic and plastic deformation?
Elastic deformation returns to it's original shape after a strain is applied. Plastic deformation returns to a deformed shape after a strain is applied. The material's molecular bonds are strained to the point of fracture, making it not possible to return to the same state. Elastic deformation will return to its original shape. Plastic deformation is when you alter the original form. To understand more on this subject you might investigate failure analysis literature. Lots of good stuff there ratchet marks, beach marks, reverse bending etc... I believe the U.S. metallurgical society has the best reference material on this subject. A temporary shape change that is self-reversing after the force is removed, so that the object returns to its original shape, is called elastic deformation. In other words, elastic deformation is a change in shape of a material at low stress that is recoverable after the stress is removed. Examples would be the loading of a bridge or building support beam where the loads remain within the original design parameters, or the use of a safety pin where when it is opened it returns to it's unloaded shape. When the stress is sufficient to permanently deform the metal, it is called plastic deformation. Examples would be the building support beams for the twin towers, where the heat generated by the fires decreased the strength of the steel and allowed it to deform plastically, or the loads that are applied to a section of electrical conduit or mechanical piping in order to bend them into a specific shape. in elastic def. , the material returns to its original shape once force is removed. in plastic, the deformation is permanent and the material doesn't return to its original shape the elastic deformation happens in yield point and elastic deformation back to original size but plastic deformation will not back tto original size.
A test specimen is stressed beyond the yield point and is then unloaded its yield point will be?
increased...because the specimen is strain hardened due to plastic deformation.
A piece of copper originally 305 mm long is pulled in tension with a stress of 276 Mpa If the deformation is entirely elastic what will be the resultant elongation?
Tension = Module x deformation Deformation= 2,51x10^-3 = 0,25%
What is the Significance of recrystallization temperature in metalworking?
Recrystallization temperature in metal working can be defined as the temperature at which the plastic deformation takes place perfectly. The stresses induced during the process is are grater than the yield strength and less than the fracture strength.
What Plastic deformation such that work hardening does not occur is called?
Cold working
What is cold forming?
Cold forming refers to the strengthening of metal through plastic deformation. It is also known as strain hardening or cold working.
What is plastic deformation?
Plastic deformation is a permanent unrecoverable deformation. When the load that caused the deformation is removed, the material will not return to it's original shape but will maintain it's newly deformed shape.
Which one will undergo plastic deformation copper or steel wire?
Copper wire will undergo plastic deformation even though it does not break like steel wire.
What is proportional strength?
When a material deforms, it does so in several stages. The first stage, called the elastic region of deformation, is linear in nature and not permanent. A stress can be applied, and once it's removed, the material will regain all of the deformation. The second stage, plastic deformation, is permanent. A material that has been stressed into the plastic region will regain the elastic deformation, but will permanently maintain the plastic.The proportional strength is the point at which plastic deformation begins.
What are 3 types of glacier movement?
fracturing, basal slip and plastic deformation or plastic flow :)
Brittle deformation would be favored over plastic deformation in what?
High Pressures is the wrong answer. The correct asswer would be cooler tempeture.
What is an arch-shape fold resulting from plastic deformation called?
syncline
Why plastic deformation important in metal not in ceramics?
Plastic deformation in metal causes it to change shape, usually under stress such as a spinning turbine vane. Ceramics cannot deform, they are too hard and would shatter.
What is the differences between brittle and ductile fracture?
In brittle fracture, no apparent plastic deformation takes place before fracture. In ductile fracture, extensive plastic deformation (necking) takes place before fracture.
Difference bw elastic and plastic torsion?
after the removal of load if the object regains its original position is called elastic deformation ....If the object cant regain its original position even after the removal of applied load is called plastic deformation...
What is the property of metals that makes possible the cold deformation of metals?
Its the Plasticity.
