0
What else can I help you with?
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 are the advantages and disadvantage of cold working of a metal?
Cold working is the plastic deformation shaping process of metals which is performed below recrystallization temperature. Usually, recrystallization temperature is 40% of melting point temperature (TR=0.40xTM). Advantages are; no oxides on the surface after operation, no hydrogen embrittlement, lower costs for process and equipment, hardening from strain. Disadvantages are; stress in the body therefore mostly it needs recovery process, much more load power necessity for plastic deformation, it becomes brittle depends to cold working percentage.
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 Plastic deformation such that work hardening does not occur is called?
The plastic deformation process that prevents work hardening is called creep. Creep occurs under constant stress over an extended period, resulting in gradual deformation without significant increase in hardness.
How do brittle objects undergo plastic deformation?
Brittle objects typically do not undergo plastic deformation due to their inability to sustain significant deformation before fracturing. Instead, brittle materials tend to fracture with minimal or no plastic deformation.
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 the plastic deformation formula used to calculate the extent of permanent deformation in a material under stress?
The plastic deformation formula used to calculate the extent of permanent deformation in a material under stress is typically represented by the equation: ( / E), where is the strain (deformation), is the stress applied to the material, and E is the material's Young's modulus.
How to calculate plastic strain in a material under deformation?
To calculate plastic strain in a material under deformation, you can use the formula: Plastic Strain Total Strain - Elastic Strain. Plastic strain is the permanent deformation that occurs in a material after it has exceeded its elastic limit. It is important to consider when analyzing the behavior of materials under stress.
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 two kinds of deformation?
Two kinds of deformation are plastic deformation, where the material changes shape permanently due to stress, and elastic deformation, where the material returns to its original shape after stress is removed.
How many types of deformation?
There are generally three main types of deformation: elastic, plastic, and brittle. Elastic deformation occurs when a material returns to its original shape after the stress is removed. Plastic deformation involves a permanent change in shape due to applied stress, while brittle deformation leads to fracture without significant deformation. Each type responds differently to stress and strain depending on the material properties and environmental conditions.
What is an arch-shape fold resulting from plastic deformation called?
syncline
Does plastic deformation occurs more readily in warm rock than in cool rock?
Yes, plastic deformation occurs more readily in warm rock than in cool rock because warm rock has lower strength and is more ductile. The higher temperatures allow for easier movement of atoms within the crystal lattice, promoting plastic deformation. Conversely, cool rock is stronger and more brittle, making plastic deformation less likely.
