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Consider the following statements:
1. Forging reduces the grain size of the metal, which results in a decrease in strength and toughness.
2. Forged components can be provided with thin sections, without reducing the strength.
1. Forging reduces the grain size of the metal, which results in a decrease in strength and toughness.
2. Forged components can be provided with thin sections, without reducing the strength.
Q.
Which of the statements given above is/are correct?
- a)Only 1
- b)Only 2
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements:1. Forging reduces the grain size of...
Answer:
Forging Process
Forging is a manufacturing process in which metal is shaped by applying compressive forces. The metal is heated to a plastic state and then deformed using a forging press or hammer. The main advantages of forging are:
- Improved mechanical properties due to the orientation of the grain flow.
- Better surface finish due to the elimination of casting defects.
- Greater reliability due to the elimination of porosity and other defects.
Effect of Forging on Grain Size
- Forging reduces the grain size of the metal, which results in an increase in strength and toughness.
- This is because the reduction in grain size leads to a greater number of grain boundaries, which act as barriers to the movement of dislocations.
- As a result, the material becomes stronger and more ductile.
Effect of Forging on Section Thickness
- Forged components can be provided with thin sections, without reducing the strength.
- This is because the orientation of the grain flow in the forging process ensures that the material is stronger in the direction of the load.
- Therefore, even if the section is thin, it can still withstand the same amount of load as a thicker section made by other manufacturing processes.
Conclusion
Therefore, statement 1 is incorrect as forging actually increases the strength and toughness of the material by reducing the grain size. Statement 2 is correct as forging allows for the production of thin sections without compromising the strength of the component. Hence the correct answer is option B.
Forging Process
Forging is a manufacturing process in which metal is shaped by applying compressive forces. The metal is heated to a plastic state and then deformed using a forging press or hammer. The main advantages of forging are:
- Improved mechanical properties due to the orientation of the grain flow.
- Better surface finish due to the elimination of casting defects.
- Greater reliability due to the elimination of porosity and other defects.
Effect of Forging on Grain Size
- Forging reduces the grain size of the metal, which results in an increase in strength and toughness.
- This is because the reduction in grain size leads to a greater number of grain boundaries, which act as barriers to the movement of dislocations.
- As a result, the material becomes stronger and more ductile.
Effect of Forging on Section Thickness
- Forged components can be provided with thin sections, without reducing the strength.
- This is because the orientation of the grain flow in the forging process ensures that the material is stronger in the direction of the load.
- Therefore, even if the section is thin, it can still withstand the same amount of load as a thicker section made by other manufacturing processes.
Conclusion
Therefore, statement 1 is incorrect as forging actually increases the strength and toughness of the material by reducing the grain size. Statement 2 is correct as forging allows for the production of thin sections without compromising the strength of the component. Hence the correct answer is option B.
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Consider the following statements:1. Forging reduces the grain size of the metal, which results in a decrease in strength and toughness.2. Forged components can be provided with thin sections, without reducing the strength.Q.Which of the statements given above is/are correct?a)Only 1b)Only 2c)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'B'. Can you explain this answer?
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