Hot isostatic pressing is to be used to produce the femoral head components of hip implants made from a novel grade of zirconia. A series of manufacturing trials have demonstrated that the processing route results in post-sintered surface features 43-107 µm (mean 74 μm) in size. In clinical use it is anticipated that the femoral heads will be loaded to maximum stress level of 50% of its tensile strength once implanted. What is the critical flaw size when in service and will the implant require polishing for it to withstand loading during clinical use? Where: • You may assume a value of 1.4 for Y • The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11 MPa.m 0.5 Select one or more: 40.9 μm b. 163.6 μm c. 20.5 μm a. Od. Yes Oe. 81.8 μm Of. No

Hot isostatic pressing is to be used to produce the femoral head components of hip implants made from a novel grade of zirconia. A series of manufacturing trials have demonstrated that the processing route results in post-sintered surface features 43-107 µm (mean 74 μm) in size. In clinical use it is anticipated that the femoral heads will be loaded to maximum stress level of 50% of its tensile strength once implanted. What is the critical flaw size when in service and will the implant require polishing for it to withstand loading during clinical use? Where: • You may assume a value of 1.4 for Y • The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11 MPa.m 0.5 Select one or more: 40.9 μm b. 163.6 μm c. 20.5 μm a. Od. Yes Oe. 81.8 μm Of. No

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Solidification of metals

The term solidification indicates the conversion of material from the state of liquid to the state of solid. The solid-state is more compact and rigid than liquid, and the solidification indicates the transformation of material from a random state to a more compact and crystalline form. The point at which dendrite formation in liquid starts taking place is referred to as the solidification point.

Question

Hot isostatic pressing is to be used to produce the femoral head components of hip implants made from a novel grade of zirconia.
A series of manufacturing trials have demonstrated that the processing route results in post-sintered surface features 43-107 µm
(mean 74 µm) in size. In clinical use it is anticipated that the femoral heads will be loaded to maximum stress level of 50% of its
tensile strength once implanted.
What is the critical flaw size when in service and will the implant require polishing for it to withstand loading during clinical use?
Where:
• You may assume a value of 1.4 for Y
• The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11 MPa.m0.5
Select one or more:
O a.
40.9 μm
b. 163.6 μm
c. 20.5 μm
O d. Yes
O e. 81.8 μm
Of. No

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Hot isostatic pressing is to be used to produce the femoral head components of hip implants made from a novel grade of zirconia. A series of manufacturing trials have demonstrated that the processing route results in post-sintered surface features 43-107 µm (mean 74 µm) in size. In clinical use it is anticipated that the femoral heads will be loaded to maximum stress level of 50% of its tensile strength once implanted. What is the critical flaw size when in service and will the implant require polishing for it to withstand loading during clinical use? Where: • You may assume a value of 1.4 for Y • The grade of zirconia has a Tensile strength of 980 MPa and a fracture toughness of 11 MPa.m0.5 Select one or more: a. 81.8 μm b. 20.5 μm c. 40.9 μm Od. 163.6 μm De. O f. Yes No
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