Some studies on mechanical properties of friction stir butt welded Al-6082-T6 plates
The conventional fusion welding of cast aluminium alloys is generally difficult due to some common defects such as porosity, oxide inclusion, and hot cracking, which in turn reduce the weld strength. In recent years, friction stir welding (FSW) was found to be very effective for the welding of various wrought aluminum alloys. This paper investigates a metal joining process called Friction Stir Welding (FSW), an innovative welding technique invented by TWI Ltd. in Great Britain in 1991. The purpose of the paper is to study the effects of process parameters in the butt welding of Al-6082-T6 plates with a thickness of 3 mm. Joints were made using different combinations of tool rotation speed, welding speed, and axial force, each at different levels. The quality of weld zone was analyzed using macrostructure. The study aims in identifying the process parameters of welding the Al6082 alloy and the effect of welding speed on the weld performance of the joint was investigated by conducting tensile and hardness tests.
Experimental investigation of hardness of FSW and TIG joints of Aluminium alloys of AA7075 and AA6061
This paper reports hardness testing conducted on welded butt joints by FSW and TIG welding process on similar and dissimilar aluminium alloys. FSW joints were produced for similar alloys of AA7075T651 and dissimilar alloys of AA7075T651- AA6061T6. The Friction stir welds of AA7075 & AA6061 aluminium alloy were produced at different tool rotational speeds of 650,700, 800, 900, 1000 and transverse speed of 30, 35, 40 mm/min. TIG welding was conducted along the rolling direction of similar and dissimilar aluminium plates. The Brinell hardness testing techniques were employed to conduct the tests; these tests were conducted on the welds to ascertain the joint integrity before characterization to have an idea of the quality of the welds
Women and Gender in Islam: Historical Roots of a Modern Debate
PART I: The Pre-Islamic Middle East Chapter 1 Mesopotamia Chapter 2 The Mediterranean Middle East PART II: Founding Discourses Chapter 3 Women and the Rise of Islam Chapter 4 The Transitional Age Chapter 5 Elaboration of the Founding Discourses Chapter 6 Medieval Islam PART III: New Discourses Chapter 7 Social and Intellectual Change Chapter 8 The Discourse of the Veil Chapter 9 The First Feminists Chapter 10 Divergent Voices Chapter 11 The Struggle for the Future Conclusion Notes Index.