Nitin Dhawan's Books

PROCESS PARAMETERS OF AL ALLOY CASTINGS PRODUCED BY HIGH PRESSURE DIE CASTING

Aluminium Alloy Castings

By: Dharmpal Deepak,Sulakshna Dwivedi,Nitin Dhawan

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PROCESS PARAMETERS OF AL ALLOY CASTINGS PRODUCED BY HIGH PRESSURE DIE CASTING

Aluminium Alloy Castings

By: Dharmpal Deepak,Sulakshna Dwivedi,Nitin Dhawan

In the current study, an industrial product (electrical wire connector) have been casted in cold chamber die casting process using LM2 aluminium alloy to produce certain specimens to be assessed under the study for the determination of the responses ( mechanical properties such as impact strength, hardness and surface roughness). As cold chamber die casting is being popularly known for its efficient and accurate casting process which can process a broad range of castings with intricate shape easily, hence it requires a lot of study in controlling the process variables with optimum combination of process variables to produce defect free and sound casting. Therefore in the current study, the process variables such as pouring temperature (725oC, 750oC, 775oC), intensification pressure (170 kg/cm2, 180 kg/cm2, 190 kg/cm2), type of coating (oil+graphite coating, dycote+graphite coating and dycote coating) and type of cooling (air cooling, water cooling and oil cooling) have been varied at three levels and 9 different experiments have been designed using Taguchi array (L9 orthogonal array) to assess the effects of different combinations of process variables over the mechanical properties (impact strength, hardness and surface roughness). The study aims at selecting the optimum combination process variables on the basis of the responses resulted in the 9 experiments. The graphs for the responses (impact strength, hardness and surface roughness) against each process variables have been plotted and carefully observed to identify the significant process variable along with respective level of operation affecting the respective response. From the overall study, intensification pressure was concluded to be the most significant process variable with maximum contribution to the impact strength and surface finish. The micrograph images captured corresponding to the respective levels of intensification pressure (170 kg/cm2, 180 kg/cm2, 190 kg/cm2) revealed the presence of shrinkage porosity corresponding to lowest level of intensification pressure (170 kg/cm2) and with further increase in intensification pressure led to a decrease in the extent of presence of porosity. Dycote coating was considered as the most optimum coating with significant contribution to the hardness. Air cooling and oil cooling were equally significant process variables with equivalent contribution to the mechanical properties.

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BookRix

Published Date

ISBN 10

3748715587

ISBN 13

9783748715580

Algorithms in Pediatrics

By: Nitin K Shah

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Algorithms in Pediatrics

By: Nitin K Shah

Algorithms in Pediatrics uses an algorithm-based approach to various paediatric disorders. The book is divided into nineteen sections covering all paediatric specialties and sub-specialties, from neonatology, through to haematology and oncology. Later sections focus on other important topics in paediatrics including emergencies in office practice, intensive care, and a final section on paediatric surgery. Every section presents algorithms based on patient history, physical examination, and laboratory studies, using a step-by-step approach. Clinical evaluation, diagnosis, treatment and management are also included, with clinical pearls throughout and key points at the end of each section, making this an ideal resource for post-graduates and paediatricians. Key Points Comprehensive, step-by-step guide to a range of paediatric disorders Nineteen sections covering all paediatric specialities and sub-specialities Clinical pearls and key points summary in each section

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Page Count

825

Publisher

JP Medical Ltd

Published Date

ISBN 10

9351521605

ISBN 13

9789351521600

R.N. Kao

Gentleman Spymaster

By: Nitin A Gokhale

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R.N. Kao

Gentleman Spymaster

By: Nitin A Gokhale

Somewhere deep in the archives of the Nehru Memorial Museum and Library (NMML) in the heart of New Delhi lies a set of papers that researchers and historians interested in recording the history of Indian intelligence, would love to get their hands on. Alas, those documents-transcripts of tape-recorded conversations with RN Kao, the legendary spy chief-are not going to be available until 2025, according to instructions left by him, months before he passed away in 2002. So until those tapes and papers are made public, any biography of Rameshwar Nath Kao or 'Ramji' to friends, colleagues and family would have to depend on personal memories of a vast array of individuals who knew him in different capacities and their interpretation of his personality and contribution.

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Page Count

215

Publisher

Bloomsbury Publishing

Published Date

ISBN 10

9389449308

ISBN 13

9789389449303

Book's by Nitin Dhawan

PROCESS PARAMETERS OF AL ALLOY CASTINGS PRODUCED BY HIGH PRESSURE DIE CASTING

PROCESS PARAMETERS OF AL ALLOY CASTINGS PRODUCED BY HIGH PRESSURE DIE CASTING

Algorithms in Pediatrics

Algorithms in Pediatrics

R.N. Kao

R.N. Kao

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