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Home > رشید حسن خان کے غیر مدوّن مضامین کی تدوین: مقالہ برائے ایم فل اردو

رشید حسن خان کے غیر مدوّن مضامین کی تدوین: مقالہ برائے ایم فل اردو

Thesis Info

Author

وقار احمد میر

Supervisor

ظفر حسین ظفر

Department

Department of Urdu

Program

Mphil

Institute

Allama Iqbal Open University

Institute Type

Public

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Page

417ص

Subject

Urdu

Language

Urdu

Other

Classification: 928.91439 و ق ر

Added

2022-07-09 15:11:20

Modified

2023-02-19 12:33:56

ARI ID

1676729896589

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۳۱۔ انتظار

انتظار

ماں ۔۔۔ !تم نے کہا تھا

بابا آسماں پر سیر کو گئے ہیں

 کل آئیں گے

میں اس کل ہی کے انتظار میں بسمل ہو گیا ہوں

اے ماں! تو بھی کہہ بابا سے

 ’’اب لو ٹ بھی آئیں ‘‘

ان کی انگلی تھامے بنا

اب چلنا مشکل ہو گیا ہے

Global Structural Changes and Global Islamic Identity

Globalization is slowly changing life and traditions of many people over the World, dramatically seeking changes in the traditional relationship between the community and people, creating a new sensibility and creativity in relationships between social groups. These changes necessarily require a new social and political model of organization for community, reorganizing and changing the nature of relationship between states.  Effort to protect identity of people usually convey in the form of the fear of the subservient economic, cultural and political position in the process of globalization. This fear frequently produces powerful vibrations indicating the need of integration of social groups with the same or similar cultural identity, what opens up a new dimension of the internal political crisis between government and society. This crisis will produce particularly dramatic changes in Islamic world generating a powerful conflict between state and society in Islamic world, with unpredictable development of relations between Islam and West.

Mechanical Characterization of Al- 6061 Strengthened by Ecap

A study was carried out to investigate the effects of equal channel angular pressing (ECAP) on mechanical properties and microstructures of Aluminum alloy Al-6061. Teflon and Nylon was also investigated to visualization deformation because of their high elastic plastic behaviour to validate the mathematical model. The severe plastic deformation (SPD) techniques were used to increase strength through grain refinement. The ECAP process has improved upon the mechanical properties of light metal alloys like Al-6061. In this process the specimen size remain unchanged and the required mechanical properties are increased by SPD technique. The design and development of ECAP experimentation was done on specimens and equipment used to do with suitable measurements and with safety precautions. The experiments were carried out on Teflon, Nylon, and Aluminum 6061. The die and ECAP fixture were designed and fabricated in the Mechanical Engineering Department at University of Engineering & Technology Taxila. A purpose built hydraulic press having capacity of 100 tons with special fixture was used to squeeze the material through ECAP die. In situ heating of die with specimen was employed for smooth flow of material through the die. The temperature was maintained at upper critical temperature (i.e. 450 0C) for two hours for obtaining homogeneous temperature. A total number of eight experiments were performed using the ECAP process on this experimental setup. II The shear strain mathematical model for ECAP was developed considering the elastic recovery of materials after angular extrusion. In addition to shear strain mathematical model, the load required to push the material through ECAP die was calculated to achieve results. The numerical simulation through ABAQUSTM 6.10.1 was performed to validate the mathematical model. The mathematical model of shear strain and orientation in axis was validated successfully with the 3% error along major axis and 2% along minor axis of ellipse. A series of tests including tensile, Vickers hardness, micro hardness, and three points bend fatigue (crack mouth opening displacement) test were performed for mechanical characterisation. In addition, metallographic and fractographic analyses were performed for microstructure verification. The 3-point bend fatigue tests were performed on as-received and ECAP specimens. The specimens were made according to ASTM-E647 standard from Al-6061 alloy. The fatigue crack growth (FCG) behaviour of as-received and ECAP was investigated and compared against different stress ratios. Different plots were drawn between different geometric parameters and found that fatigue crack growth was slower in ECAP specimens as compared to asreceived specimens. This slow rate of FCG was mainly due to the increase in strength by grain refinement introducing severe plastic deformation. The mechanical and microstructure analyses validated grain refinement through ECAP process. A 25% increase in Vickers hardness, 15% improvement in yield strength and 35% enhancement in ultimate tensile strength was recorded