Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Question
Chapter 7, Problem 31CQ
To determine
The numbers of active slip system in polycrystalline MgO to maintain continuity with plastic strain.
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Students have asked these similar questions
Q7> Ductile-to-brittle transition temperature (DBTT) is a very important parameter in the design of metallic
materials for engineering applications. It has been well known that most of BCC and HCP metals show the DBT
phenomenon; however, there is no DBTT in FCC metals.
(a) Explain the reason in terms of deformation and fracture. You must compare the BCC and FCC.
(b) The ductile fracture surface consists of many dimples.
Explain their formation mechanism from the concept of point defects.
(c) There are two types in the brittle fracture. Explain and Compare them.
A single crystal of BCC iron is subjected to tensile stress of 100 MPa along the [001] direction. Which of the two slip systems ((211) –[ 111 ] or (321)–[ 111 ]) is going to yield first?
The modulus of elasticity are slightly higher for ceramic
materials, Polymers have modulus values that are smaller than
both metals and ceramics.
Chapter 7 Solutions
Materials Science And Engineering Properties
Ch. 7 - Prob. 1CQCh. 7 - Prob. 2CQCh. 7 - Prob. 3CQCh. 7 - Prob. 4CQCh. 7 - Prob. 5CQCh. 7 - Prob. 6CQCh. 7 - Prob. 7CQCh. 7 - Prob. 8CQCh. 7 - Prob. 9CQCh. 7 - Prob. 10CQ
Ch. 7 - Prob. 11CQCh. 7 - Prob. 12CQCh. 7 - Prob. 13CQCh. 7 - Prob. 14CQCh. 7 - Prob. 15CQCh. 7 - Prob. 16CQCh. 7 - Prob. 17CQCh. 7 - Prob. 18CQCh. 7 - Prob. 19CQCh. 7 - Prob. 20CQCh. 7 - Prob. 21CQCh. 7 - Prob. 22CQCh. 7 - Prob. 23CQCh. 7 - Prob. 24CQCh. 7 - Prob. 25CQCh. 7 - Prob. 26CQCh. 7 - Prob. 27CQCh. 7 - Prob. 28CQCh. 7 - Prob. 29CQCh. 7 - Prob. 30CQCh. 7 - Prob. 31CQCh. 7 - Prob. 32CQCh. 7 - Prob. 33CQCh. 7 - Prob. 34CQCh. 7 - Prob. 35CQCh. 7 - Prob. 36CQCh. 7 - Prob. 37CQCh. 7 - Prob. 38CQCh. 7 - Prob. 39CQCh. 7 - Prob. 40CQCh. 7 - Prob. 41CQCh. 7 - Prob. 42CQCh. 7 - Prob. 43CQCh. 7 - Prob. 44CQCh. 7 - Prob. 45CQCh. 7 - Prob. 46CQCh. 7 - Prob. 47CQCh. 7 - Prob. 48CQCh. 7 - Prob. 49CQCh. 7 - Prob. 50CQCh. 7 - Prob. 51CQCh. 7 - Prob. 52CQCh. 7 - Prob. 1DRQCh. 7 - Prob. 2DRQCh. 7 - Prob. 3DRQCh. 7 - Prob. 4DRQCh. 7 - Prob. 5DRQCh. 7 - Prob. 6DRQCh. 7 - Prob. 7DRQCh. 7 - Prob. 8DRQCh. 7 - Prob. 1ETSQCh. 7 - Prob. 2ETSQCh. 7 - Prob. 3ETSQCh. 7 - Prob. 4ETSQCh. 7 - Prob. 5ETSQCh. 7 - Prob. 6ETSQCh. 7 - Prob. 7ETSQCh. 7 - Prob. 8ETSQCh. 7 - Prob. 9ETSQCh. 7 - Prob. 7.1PCh. 7 - Prob. 7.2PCh. 7 - Prob. 7.3PCh. 7 - Prob. 7.4PCh. 7 - Prob. 7.5PCh. 7 - Prob. 7.6PCh. 7 - Prob. 7.7PCh. 7 - Prob. 7.8PCh. 7 - Prob. 7.9PCh. 7 - Prob. 7.10PCh. 7 - Prob. 7.11PCh. 7 - Prob. 7.13P
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- 14) Inc a) Copper and its alloys do not fail due to cycling loading if the applied stress amplitude is below a certain level. b) Alloys with HCP crystal structure do not fail due to cycling loading if the applied stress amplitude is below a certain level. c) If there exist many slip systems such metals and alloys do not fail due to cycling loading if the applied stress amplitude is below a certain level. d) The practical rule that says there exist a fatigue limit for iron based alloys is not strictly true. 15) Indicate the incorrect expression: a) Better surface finish would help increase fatigue life. b) All kinds of inhomogenity would be detrimental in number of cycles that material can terms of the endure regardless of the stress level. c) Corrosion on a material that has excellent surface finish would not affect fatigue behavior of that part. d) Sand blasting as a source of compressive stresses would be useful under fatigue conditionsarrow_forwardConsidering a finite cylinder of single crystal aluminum with a diameter (D) that has an axial unit screw dislocation at the center, what is the stress field around this dislocation in terms of D (diameter of cylinder) and r (radius which is the distance from dislocation center)arrow_forwardGiven 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. Decreasing the difference between the maximum and minimum stress values, as this effects the stress concentration factor b. Decreasing the temperature below the brittle-ductile transition temperature, to make it harder C. Polishing to reduce surface defects Od. Increasing its volume, to give a larger cross sectional area Oe. Increasing the grain size so there are less grain boundaries to initiate failurearrow_forward
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