Discuss the trend for the hardness number of each metal with different indentation locations and explain what caused this trend.

Q: For a 10-mm-diameter Brinell hardness indenter, what will be the diameter of an indentation in mm to…

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Q: A cylindric shape steel sample was tested by Rockwell hardness test and showed a hardness value 80…

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Q: How does the carbon content in plane carbon steels affect the fracture toughness? Show this…

A: The fracture energy of a material is tested by using impact tests. The impact test measures the…

Q: A Cu-30% Zn brass plate, originally 1.20 inches thick, is desired to have a yield strength greater…

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Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

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Q: Sketch a diagram showing impact energy as a function of temperature, of (i) 0.1% carbon steel; (ii)…

A: given; sketch a diagram showing impact energy as a function of temperature of (i) 0.1% carbon steel…

Q: in a tabular format compare microstructure,for different cast irons and steel

A: Types Nature Form Comments Ferrite Soft and ductile In the form of flakes   Cementite(Fe3C)…

Q: If the Vicker’s hardness  number (HVN) is 385 N/mm2, how much load was applied on the test specimen…

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Q: A hardness of 45 Rc is required for a plain carbon steel containing 0.6% carbon. Can you explain…

A: The hardness of high carbon steel is given as 45 Rc. The carbon steel containing carbon is given as…

Q: What are strengthening mechanisms for metals? Explain. (if it necessary, on figures)

A: Each Engg. Material has its own properties which include some good and some bad according to their…

Q: summarize the way in which fine _grain microstructure behave with regard to low temperature and room…

A: Grain size microstructure behave with regard to low temperature and room temperature strength and…

Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: Medium (0.3-0.5%C)  or high carbon steel (0.6-1%C) can be hardened by quenching and tempering. The…

Q: Discuss how the defects allow a metal to plastically deform

A: Given Data : Defects Plastical deformation

Q: What is the importance of knowing the Mechanical Properties of a certain kind of Metal? enumerate

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Q: Determine the indentation diameter of a mild steel material subjected to a Brinell hardness test…

A: 1. Indentation Diameter 10.48mm   2.Surface area of indentation 184.577 mm square

Q: For a 10-mm-diameter Brinell hardness indenter, what will be the diameter of an indentation in mm to…

A: Given data: D=10 mmHB=300 HBP=500 kg Need to determine the diameter of an indentation.

Q: Define the hardness of a metal and how is the hardness of a material determined by a hardness…

A: Hardnesss :- Hardness is defined as the ability of the material to resist deformation under the…

Q: When is Strain hardening used? How is it performed?

A: Strain hardening is used when there is a need to increase the hardness of the material. It also…

Q: In a sample made of an alloy that has not been subjected to cold forming, the average grain size is…

A: Yes, it is possible.  Grain size is often determined by the rate at which the material cooled during…

Q: What is the effect of resolved normal stress on the yield behavior of crystalline metals and…

A: As we know the yielding of metals and ceramics by the dislocation motion is solved by the resolved…

Q: Plot the engineering stress-strain curve these data Determine the 0.2 percent offset yield stress…

A: Stress and strain readings from the experiment are given

Q: Explain the difference between hardness and hardenability

A: The different Mechanical properties of engineering materials are: Elasticity Plasticity Ductility…

Q: Briefly explain the ASTM grain-size standard. Draw a stress-strain curve for a ductile metal and…

A: ASTM grain size standard: ASTM (American Society for Testing and Materials) grain size standard is…

Q: With the aid of sketches compare and contrast the fatigue fracture appearance between an alloy that…

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Q: Explain the principle of stress and

A: Principal stresses are maximum and minimum value of normal stresses on a plane (when rotated through…

Q: What is G-P zone? Draw yield stress vs. aging time, use a simple sketch and explain the mechanism.…

A: G-P Zone

Q: Answer in a brief and concise essay. Why do we need to study the mechanical properties of a metal?

A: Study of mechanical properties of metals is a must for technological advancement. Mechanical…

Q: There are differences in the mechanical behavior of resulting material from (1) tempering martensite…

A: Given:-          If we increase the temperature the martensite transforms to the ferrite and…

Q: What engineering application can we use nonferrous metal? Explain the type of materials that you use…

A: The materials which doesn't contain iron as it's major constituent are generally known as non…

Q: Explain what the meaning of strain hardening is, how it happens in the materials. Do you think…

A: Strain hardening or work hardening: When a metal is deformed beyond the yield point but less than…

Q: What will be the maximum force that can be withstood by a rod

A: The tensile strength (tensile stress) of the aluminium alloy rod σt=140 MPa Cross sectional area of…

Q: Summarize the way in which fine-grain microstructures behave with regard to low temperature and room…

A: At low temperatures, finer grain structures exhibit a decreased DBTT and an improvement…

Q: (c) Explain the reason of FCC metals are often recommended for use at low temperatures, particularly…

A: The brittleness of the material is  inversely proportional to the impact strength of the material.…

Q: 6. How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: We can increase the hardness of low carbon steel by the carburizing process.

Q: Determine Brinell Hardness Number for a specimen that has a surface area of indentation as 19 mm2…

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Q: Estimate the linear relationship between the Ultimate Tensile Strength and HBN for the range of…

A: here take linear line of brass alloys from  strength Vs BHN diagram. Now locate extreme point of…

Q: 1-What is hardness and what is the benefit of calculating it? 2- Classify the materials that have…

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Q: Analyze and discuss the difference in the obtained tensile properties to microstructure relation…

A: Please refer the answer in next page.

Q: Cold forming method is applied to many metals and alloys such as steel, aluminum and copper at room…

A: The factor that leads to increase in the strength of the material in cold forming is strain…

Q: Explain from the engineering perspective why the two heat-treated (air-cooled and water-cooled)…

A: From engineering perspective the steel which is air cooled are generally more harder than water…

Q: When a 3000 kg load is applied to a 10-mm-diameter ball in a Brinell test of a steel,an indentation…

A: Given Data⇒ Load applied(F)= 3000 kgf Diameter of ball(d)=10 mm=0.01 m After indentation, change in…

Q: write the names of the destructive (mechanical) tests applied to metal-based materials and explai at…

A: the tests that are commonly used are - Izod and Charpy tests

Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: Solution:

Q: List the factors that you would consider in selecting a hardness test. Explain why.

A: The solution is attached below:

Q: A piece of metal was indented at a load of 100 kgf with a 10 mm diameter tungsten carbide ball. If…

A: GIVEN DATA- Load P=100kgf Diameter of bll D=10mm Diameter of indenter d=20% of 10mm We have to find…

Q: How do you increase the hardness of components being made from 0.8% carbon steel? Explain the…

A: Solution:

Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.