Background
Mishra, Rajiv Sharan was born on July 15, 1961 in Chapra, Bihar, India. Son of Shambhu Sharan and Indu Mishra.
(This book covers the rapidly growing area of friction sti...)
This book covers the rapidly growing area of friction stir welding. It also addresses the use of the technology for other types of materials processing, including super-plastic forming, casting modification, and surface treatments. The book has been prepared to serve as the first general reference on friction stir technology. Information is provided on tools, machines, process modeling, material flow, microstructural development and properties. Materials addressed include aluminum alloys, titanium alloys, steels, nickel-base alloys, and copper alloys. The chapters have been written by the leading experts in this field, representing leading industrial companies and university and government research institutions.
http://www.amazon.com/gp/product/087170840X/?tag=2022091-20
( This book describes the fundamentals of residual stress...)
This book describes the fundamentals of residual stresses in friction stir welding and reviews the data reported for various materials. Residual stresses produced during manufacturing processes lead to distortion of structures. It is critical to understand and mitigate residual stresses. From the onset of friction stir welding, claims have been made about the lower magnitude of residual stresses. The lower residual stresses are partly due to lower peak temperature and shorter time at temperature during friction stir welding. A review of residual stresses that result from the friction stir process and strategies to mitigate it have been presented. Friction stir welding can be combined with additional in-situ and ex-situ manufacturing steps to lower the final residual stresses. Modeling of residual stresses highlights the relationship between clamping constraint and development of distortion. For many applications, management of residual stresses can be critical for qualification of component/structure. • Reviews magnitude of residual stresses in various metals and alloys • Discusses mitigation strategies for residual stresses during friction stir welding • Covers fundamental origin of residual stresses and distortion
http://www.amazon.com/gp/product/012800150X/?tag=2022091-20
( The use of friction stir processing to locally modify t...)
The use of friction stir processing to locally modify the microstructure to enhanced formability has the potential to alter the manufacturing of structural shapes. There is enough research to put together a short monograph detailing the fundamentals and key findings. One example of conventional manufacturing technique for aluminum alloys involves fusion welding of 5XXX series alloys. This can be replaced by friction stir welding, friction stir processing and forming. A major advantage of this switch is the enhanced properties. However qualification of any new process involves a series of tests to prove that material properties of interest in the friction stir welded or processed regions meet or exceed those of the fusion welded region (conventional approach). This book will provide a case study of Al5083 alloy with some additional examples of high strength aluminum alloys. • Demonstrates how friction stir processing enabled forming can expand the design space by using thick sheet/plate for applications where pieces are joined because of lack of formability • Opens up new method for manufacturing of structural shapes • Shows how the process has the potential to lower the cost of a finished structure and enhance the design allowables
http://www.amazon.com/gp/product/012420113X/?tag=2022091-20
(This book lays out the fundamentals of friction stir weld...)
This book lays out the fundamentals of friction stir welding and processing and builds toward practical perspectives. The authors describe the links between the thermo-mechanical aspects and the microstructural evolution and use of these for the development of the friction stir process as a broader metallurgical tool for microstructural modification and manufacturing. The fundamentals behind the practical aspects of tool design, process parameter selection and weld related defects are discussed. Local microstructural refinement has enabled new concepts of superplastic forming and enhanced low temperature forming. The collection of friction stir based technologies is a versatile set of solid state manufacturing tools.
http://www.amazon.com/gp/product/3319070428/?tag=2022091-20
( This book describes the fundamentals and potential appl...)
This book describes the fundamentals and potential applications of ‘friction stir superplasticity for unitized structures’. Conventional superplastic forming of sheets is limited to the thickness of 3 mm because the fine grained starting material is produced by rolling. Friction stir superplasticity has grown rapidly in the last decade because of the effectiveness of microstructural refinement. The thickness of the material remains almost constant, and that allows for forming of thick sheets/plates, which was not possible before. The field has reached a point where designers have opportunities to expand the extent of unitized structures, which are structures in which the traditional primary part and any supporting structures are fabricated as a single unit. With advanced optimization and material considerations, this class of structures can be lighter weight and more efficient, making them less costly, as well as mechanically less complex, reducing areas of possible failure. • Discusses how friction stir processing allows selective microstructural refinement without thickness change • Demonstrates how higher thickness sheets and plates can be superplastically formed • Examples are presented for aluminum, magnesium and titanium alloys • Covers the production of low-cost unitized structures by selectively processing cast sheets/plates
http://www.amazon.com/gp/product/0124200060/?tag=2022091-20
( This book will summarize research work carried out so f...)
This book will summarize research work carried out so far on dissimilar metallic material welding using friction stir welding (FSW). Joining of dissimilar alloys and materials are needed in many engineering systems and is considered quite challenging. Research in this area has shown significant benefit in terms of ease of processing, material mixing, and superior mechanical properties such as joint efficiencies. A summary of these results will be discussed along with potential guidelines for designers. • Explains solid phase process and distortion of work piece • Addresses dimensional stability and repeatability • Addresses joint strength • Covers metallurgical properties in the joint area • Covers fine microstructure • Introduces improved materials use (e.g., joining different thicknesses) • Covers decreased fuel consumption in light weight aircraft • Addresses automotive and ship applications
http://www.amazon.com/gp/product/0128024186/?tag=2022091-20
( Friction Stir Casting Modification for Enhanced Structu...)
Friction Stir Casting Modification for Enhanced Structural Efficiency: A Volume in the Friction Stir Welding and Processing Book Series summarizes current research and applications of friction stir processing techniques for casting modification. Research in this area has shown significant benefit in terms of fatigue performance as a result of friction stir processing. This book addresses the latest research, providing readers with a summary of these results and new guidelines for designers. • Provides the benefits of friction stir casting, including its solid phase process, low distortion of workpiece, good dimensional stability and repeatability, high joint strength, and more • Summarizes current research and applications of friction stir processing techniques for casting modification • Presents it usage in the production of products such as rugs, wire, or any other gases, and its applications for decreased fuel consumption in light weight aircraft, and its automotive and ship applications
http://www.amazon.com/gp/product/0128033592/?tag=2022091-20
(Friction stir welding (FSW) and its variants, friction st...)
Friction stir welding (FSW) and its variants, friction stir spot welding and friction stir processing, are used in numerous industrial applications and there is considerable activity in the development of FSW processes and their applications. This volume covers the seventh proceedings in this recurring TMS symposium, focusing on all aspects of the science and technology involved in friction stir welding and processing. An important reference for materials scientists and engineers, metallurgists, and mechanical engineers in such areas as shipbuilding, aerospace, automotive, and railway rolling stock.
http://www.amazon.com/gp/product/1118605780/?tag=2022091-20
educator metallurgical engineer
Mishra, Rajiv Sharan was born on July 15, 1961 in Chapra, Bihar, India. Son of Shambhu Sharan and Indu Mishra.
B. Engineering, University of Rajasthan, Jaipur, India, 1982. Master of Technology, Indian Institute of technical, Kanpur, India, 1985. Doctor of Philosophy, University Seffield, England, 1988.
Scientist, group leader Defense Metallurgical Research Laboratory, Hyderabad, India, 1988—1994. Postgraduate research engineer University California, Davis, 1994—1997, adjunct assistant professor, 1997—1999. Assistant professor University Missouri, Rolla, since 1999.
Member manufacturing education executive committee University Missouri, Rolla, since 1999. Vice-chairman Joint American Society for Microbiology/the Minerals, Metals & Materials Society Committee on Mechanical Behavior of Materials, Warrendale.
( Friction Stir Casting Modification for Enhanced Structu...)
(Friction stir welding (FSW) and its variants, friction st...)
( The use of friction stir processing to locally modify t...)
( This book describes the fundamentals of residual stress...)
( This book will summarize research work carried out so f...)
( This book describes the fundamentals and potential appl...)
(This book lays out the fundamentals of friction stir weld...)
(This book covers the rapidly growing area of friction sti...)
Member of American Welding Society, Society Manufacturing Engineers, The Minerals, Metals and Materials Society, American Society Metals, Indian Institute of Metals (life).
Married Sarita Trivedi. Children: Mayank, Rajit.