Expert Details

Expert in Physical Metallurgy, Materials Joining, Alloy Design, Computational Metallurgy, Thermodynamics

Expert ID: 724354 Australia

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Arc welding is one of the most widely used metal joining technique. On a commercial scale, this is of vital importance and many of the metals are better arc welded to yield a strong joint. But, this also means there is a change in the mechanical properties from that of the parent metal.


The weld electrodes or the filler materials along with the process parameters should be chosen in a way that the weld has better properties compared to the parent material. Variety of welding techniques could be used. The most crudest and simplest of the all is the SMAW. On a large scale GMAW would be preferred. The weld pool shape and the microstructure affect how the joint is going to perform under different kinds of loading conditions (fatigue or creep etc). Power plant steels specifically are prone to precipitate dissolution that could cause problems in the creep life. On the other hand, subzero operations require tough welds and the microstructure has to be appropriately controlled.

His expertise in this area would contribute to selection of filler material of tailor designed composition designed for a particular purpose.

Annealing can be of different types. Either it could be done for tempering or a hard martensitic microstructure or for stress relieving or for homogenizing. Depending upon the temperature and time of annealing the mechanical properties get affected. An optimum selection of the heat treatment parameters is important in this case. Microstructurally presence of precipitates or any deformation could affect the annealing properties by influencing the recrystallization tendencies.

Internet is becoming an imperative tool for communication. Expert has been related to this fascinating web for 10 years and has been hosting web pages for some time. Has maintained web servers (Apache) and email servers (Dovecot -pop or imap and senmail based). Has built clusters hands on using a combination of desktop computers to obtain about 12 GFlops computing power.


This is available on internet for open access and job submission. He has hosted pages that use PHP as SSI. Web based email and greeting pages have been developed by expert as a hobby.


He would appreciate users who have problems with their html, php, javascript, email and web servers based on Linux to contact Expert. However, expert can provide you with solutions virtually on any platform as he has good grasp on the concepts which do not vary with platforms.

Structural Ferro-alloys is his cup of tea. Expert has worked on steels of high-strength and toughness applications, high-temperature creep (power plant steels). Can give you information on the phases that could form during a particular processing of steel and also suggest what alloy would best suit your need.

Creep in steels would be the area where he can help. He has done much research on how various precipitates help in reducing creep in power-plant steels where the alloy is expected to survive for 30 years at 600 C, where creep is the very much operative.

Built interface with rapid prototyping robots for developing steel structures at ABB corporate house, Vastaraus, SwedenDeveloped eight novel low-ferrite content weld electrodes for Siemens Westinghouse Corporation, USA

Education

Year Degree Subject Institution
Year: 2002 Degree: PhD Subject: Materials Engineering Institution: University of Cambridge
Year: 1999 Degree: Masters of Technology Subject: Materials Engineering Institution: IIT Madras, India and RWTH Aachen, Germany

Work History

Years Employer Title Department Responsibilities
Years: 2003 to Present Employer: Undisclosed Title: Research Scientist Department: Research and Development Responsibilities:
Years: 2007 to 2010 Employer: Tata Steel Title: Research Scientist Department: Research and Development Responsibilities:
Years: 2010 to Present Employer: Undisclosed Title: Senior Lecturer Department: Faculty of Engineering Responsibilities:

Government Experience

Years Agency Role Description
Years: 2003 to Present Agency: Oak Ridge National Laboratory Role: Research Scientist Description: Researching and identifying projects relevant to the organisation

International Experience

Years Country / Region Summary
Years: 1998 to 1999 Country / Region: Germany Summary: He was a research worker at RWTH Aachen.
Years: 1999 to 2002 Country / Region: United Kingdom Summary: He was a Ph.D research candidate at the University of Cambridge
Years: 2003 to 2004 Country / Region: USA Summary: He was a research scientist at the Oak Ridge National Laboratory, USA
Years: 2004 to 2006 Country / Region: Singapore Summary: He was a Professor and had developed many articles for both PG and UG candidates.

Career Accomplishments

Professional Appointments
Editorial board member for STWJ, IOM3 journal
Awards / Recognition
Commonwealth Fellow, DAAD Fellow, ORAU fellow,
Publications and Patents Summary
29 publications, 5 invited lectures

Additional Experience

Training / Seminars
Innovation in materials, Building on Linux (servers, administrations etc), Models to predict mechanical properties and transformation in steel welds
Other Relevant Experience
Has performed consultation for Siemens Westing house, ABB corporate house, Sweden

Language Skills

Language Proficiency
English
German

Fields of Expertise

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