A single crystal Ni (in FCC) alloy bar is uniaxially pulled along [-123]. The bar starts to yield at σ =100MPa by slipping on (111)[-101] which hence is the most favorable slip system. (1) Determine the critical resolved shear stress TCRSS for this Ni alloy.(2) Another single crystal bar made of the same Ni alloy is uniaxially pulled along [oī2], and the most favorableslip system is determined to be (1ī1)[ T01]. Determine the yield strength for this single crystal bar (with loadingaxis along [oī2]).(3) A bi-crystal is a polycrystalline material with two grains. Here, a bi-crystal bar made of the same Ni alloycontains two grains: grain 1 with [123] along the bar axis and grain 2 with [o72] along the bar axis. If weuniaxially pull the bar, determine which grain would yield first based on the results of (1) and (2) above.Grain 1Grain 2

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Answered: A single crystal Ni (in FCC) alloy bar…

A single crystal Ni (in FCC) alloy bar is uniaxially pulled along [-123]. The bar starts to yield at σ =100MPa by slipping on (111)[-101] which hence is the most favorable slip system.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter7: Components Of Optical Instruments

Section: Chapter Questions

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Question

A single crystal Ni (in FCC) alloy bar is uniaxially pulled along [-123]. The bar starts to yield at σ =100MPa by slipping on (111)[-101] which hence is the most favorable slip system.

(1) Determine the critical resolved shear stress TCRSS for this Ni alloy.
(2) Another single crystal bar made of the same Ni alloy is uniaxially pulled along [oī2], and the most favorable
slip system is determined to be (1ī1)[ T01]. Determine the yield strength for this single crystal bar (with loading
axis along [oī2]).
(3) A bi-crystal is a polycrystalline material with two grains. Here, a bi-crystal bar made of the same Ni alloy
contains two grains: grain 1 with [123] along the bar axis and grain 2 with [o72] along the bar axis. If we
uniaxially pull the bar, determine which grain would yield first based on the results of (1) and (2) above.
Grain 1
Grain 2

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