HW8 ENMA300 - ENMA 300 Homework 8 1a) The critical resolved...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ENMA 300 Homework 8 1a) The critical resolved shear stress for copper is 0.48 MPa (70 psi). Determine the minimum possible yield strength for a single crystal of Cu pulled in tension. bi) A single crystal of a metal that has the BCC crystal structure is oriented such that a tensile stress is applied in the [100] direction. If the magnitude of this stress is 4.0 MPa, compute the resolved shear stress in the [1 1 1] direction on each of the (110), (011), and (10 1 ) planes. bii) On the basis of these resolved shear stress values, which slip system(s) is (are) most favorably oriented? 2. Explain in your own words the three strengthening mechanisms for metals discussed in this chapter (i.e. grain size reduction, solution strengthening and strain hardening). Be sure to explain how dislocations are involved in each of these techniques. b. Briefly explain why small-angle grain boundaries are not as effective in interfering with the slip process as are high-angle grain boundaries. c. Would these mechanisms work well for a material like Si?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/02/2011 for the course ENMA 300 taught by Professor Alsheikhly during the Spring '11 term at University of Maryland Baltimore.

Page1 / 2

HW8 ENMA300 - ENMA 300 Homework 8 1a) The critical resolved...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online