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Home > Computer Simulation of Point Defect Twin Boundary Interactions in Face Centred Cubic Metals.

Computer Simulation of Point Defect Twin Boundary Interactions in Face Centred Cubic Metals.

Thesis Info

Access Option

External Link

Author

Ghafoor, Abdul

Program

PhD

Institute

The Islamia University of Bahawalpur

City

Bahawalpur

Province

Punjab

Country

Pakistan

Thesis Completing Year

1993

Thesis Completion Status

Completed

Subject

Physics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/3036/1/211.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676725780216

Similar


A new method has been established to compute the variants of point defect clusters depending on their symmetry. Results are presented! for close- packed clusters of up to five point defects in cubic crystals. Interesting) relations among the variants of point defect clusters in two and three dimensiqnal lattice structures have been noted. Computer simulation techniques haye been employed to determine the relaxed structures and energies of sortie planar defects using manv-body potentials developed by Ackland et at. (198ir). The structures of some low index twin boundaries, e g. (130), (1j23), (140) and (114) in Copper, are explored 4? to examine their energy configurations. In (140) and (114) twin boundaries local atomic adjustments are made to obtain low interfacial energy. The atomic planes twin interface in all the cases. The interactions of coalesce at the vacancy with (1$0), (123), (140) and (114) boundaries are studied. For single vacancy the maximum binding energy for (123) and (114) boundary is observed when vacancy lies at the plane adjacen: to the interface. The structures and energies of (111), (001) and (110) twist boundaries with different misorientation angles in copper, silver, and investigated as well. It is observed that in-plane translations are flold necessary to establish low energy (110) twist boundary.
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90:01
a. I swear by this City,

90:02
a. and you – O The Prophet - are a resident of this City,

90:03
a. as well as any parent and anyone born of him.

90:04
a. Indeed, WE created human being in stages of difficulty and hardship.

90:05
a. Now that he is in the midst of blessings,
b. does he think that no one will have power over him to hold him accountable?

90:06
a. For he boasts:
b. ‘I have squandered a great deal of wealth!’

90:07
a. Does he think that no one ever watches him with regard to what he has expended?
b. Indeed, Allah watches him all the time!

90:08
a. Have WE not given two eyes to him,
b. to see and recognize the truth?

90:09
a. And a tongue, and a pair of lips,
b. to speak and advocate the truth?

90:10
a. And have WE not showed him the two ways:
b. virtue and vice; good and evil?

Surah 90 * Al-Balad 737

90:11
a. Yet he makes no attempt to the steep/uphill way, i.e., good, virtue.

90:12
a. And what will enable you to comprehend the steep/uphill way?

90:13
a. The setting free of the neck from the burden of bondage or debt,

90:14
a. or, giving food at the time of one’s hunger/impoverishment,

90:15

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