2a: How a material can be mechanically strengthened by designing the grain size after thermomechanicaltreatments?2b: How can the extent of cold work be defined?2c: Specimen A (1008 steel) has an ASTM grain size number of 8 and specimen B (1008 steel) has a grainsize number of 4.Which specimen will be having larger grains? A or B2d: How increasing grain size can play role in decreasing the Toughness?2e: Is EBSD without using specimen stage tilting is possible?

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Answered: 2a: How a material can be mechanically…

Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN:9781305494695

Author:Larry Jeffus

Publisher:Larry Jeffus

Chapter26: Welding Metallurgy

Section: Chapter Questions

Problem 25R: What are the common types of strength measurements?

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Given your understanding of what initiates and controls failure in materials, which of the following will increase the failure strength or lifetime of a test piece or component and why? a. Increasing the grain size so there are less grain boundaries to initiate failure b. Decreasing the temperature below the brittle-ductile transition temperature, to make it harder c. Decreasing the difference between the maximum and minimum stress values, as this effects the stress concentration factor d. Polishing to reduce surface defects e. Increasing its volume, to give a larger cross sectional area
Distinguish between the Brittle material and the Ductile material?
Note: Kindly give me both right answers. A) Did the ductile materials (annealed and aluminium) react differently to the two different testing methods (hardness test vs. tensile test)? What does this say about the behaviour of ductile materials in compression vs. tension? B) Did the brittle material (quenched) react differently to the two different testing methods (hardness test vs. tensile test)? What does this say about the behaviour of brittle materials in compression vs. tension? （Three to five sentence answers are good）（engineering material)
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21- In which one does the increasing strain rate in response to constant stress occur?A) fully elastic materialB) super plastic materialC) elastic and full plastic materialD) elastic and hardening materialE) semi-plastic material•22- what type of strain causes sprains?A) slipB) don't turnC) pullD) bendingE) pressing•23- Which type of rockwell hardness is suitable for non-ferrous metals?A) BB) EC) AD) CE) D
1. Please draw a typical tensile test curve for low carbon steels and mark the four stages and list their names (use critical points on the curve to help you identify the start and end points of the four stages). 2. Show the yield, ultimate tensile strength and fracture points, as well as yield and ultimate tensile strength on the curve. 3. Please draw the load and unload curve for a stress level causing the low carbon steels to experience elastic deformation only. 4. Please draw the load and unload curve for a stress level causing the low carbon steel to experience permerment deformation, and identify both elastic and plastic strain on the drawing after unloading.
What is the relationship factor between the fatigue test and any other mechanical property (tensile test, hardness test, impact test)?
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AWhat is the difference between tensile strength and yield strength in materials?
On a stress strain curve for structural steel, show various points like proportional limit, elastic limit, ultimate strength and rupture point. Give a brief description of these points. How to determine the yield point for materials that do not exhibit a well defined yield point? Name some of such materials. What is allowable load/stress. Give two different equations that determine the allowable load/stress.
Certainly! Below is a question on the subject of Mechanical Engineering, presented in the specified table format. | Full Question Text | What is the process used to increase the hardness and strength of a material by controlled heating and cooling? | A | B | C | D | E | | Annealing | Quenching | Tempering | Forging | Casting

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