For each question, provide an explanation, identifying the correct choice ( it is marked in red) and explaining why it's the right answer, as well as why the other options are incorrect. Please do 1, 2. 1. During aging of an Aluminum alloy at 300°C, maximum hardness is achieved after 5hr of aging.To achieve a higher hardness for the same alloy what combination of aging time and temperaturewould you choose?a. Temp < 300°C, time > 5hrb. Temp < 300°C, time < 5hrc. Temp > 300°C, time > 5hrd. Temp > 300°C, time < 5hr2. Mechanical properties of an alloy with melting temperature of 900°C are calculated throughtensile testing at two temperatures and strain rates. Which of the following combinations leads tothe highest yield strength:a. Temperature = 25°C, Strain rate = 1s-1b. Temperature = 500°C, Strain rate = = 1s-1c. Temperature = 25°C, Strain rate = 0.1s-1d. Temperature = 500°C, Strain rate = 0.1s-1I

Answered: Image /qna-images/answer/987dab92-c734-446b-a371-88996459aedb.jpg

For each question, provide an explanation, identifying the correct choice ( it is marked in red) and explaining why it's the right answer, as well as why the other options are incorrect. Please do 1, 2.

For each question, provide an explanation, identifying the correct choice ( it is marked in red) and explaining why it's the right answer, as well as why the other options are incorrect. Please do 1, 2.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.7: Heat Treatment Of Metals

Problem 2RQ: Direct hardening can be performed on steel containing at least________ carbon.

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

For each question, provide an explanation, identifying the correct choice ( it is marked in red) and explaining why it's the right answer, as well as why the other options are incorrect.

Please do 1, 2.

1. During aging of an Aluminum alloy at 300°C, maximum hardness is achieved after 5hr of aging.
To achieve a higher hardness for the same alloy what combination of aging time and temperature
would you choose?
a. Temp < 300°C, time > 5hr
b. Temp < 300°C, time < 5hr
c. Temp > 300°C, time > 5hr
d. Temp > 300°C, time < 5hr
2. Mechanical properties of an alloy with melting temperature of 900°C are calculated through
tensile testing at two temperatures and strain rates. Which of the following combinations leads to
the highest yield strength:
a. Temperature = 25°C, Strain rate = 1s-1
b. Temperature = 500°C, Strain rate = = 1s-1
c. Temperature = 25°C, Strain rate = 0.1s-1
d. Temperature = 500°C, Strain rate = 0.1s-1
I

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