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Technology
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                              From the Desk of Guest Editor

                                Aluminium alloys have emerged as the material of choice for a variety of defence
                            applications due to advantages like light weight, high corrosion resistance, high stress corrosion
                            resistance, high weldability, easy fabricability and excellent recyclability. The country’s defence
                            applications require about eight to ten thousand tons of wrought, speciality aluminium alloys
                            per annum. This figure is growing steadily as more numbers of DRDO programmes attain
                            production status.

                                DMRL has emerged as a nodal point for taking up development-cum-production orders
                            from various DRDO projects/ agencies for manufacturing speciality aluminium alloys at
                            the industrial scale. This is the result of dedicated and continual in-house R&D studies of a
                            variety of commercial and experimental aluminium alloys for a period spanning more than
                            three decades.

   For most engineering applications, a combination of properties is always required in a given material. To achieve
these properties, it is necessary that in-depth analyses of processing-microstructure-property relationships of such
materials are carried out. Also, processing parameters of commercial materials produced by major production agencies/
companies are always proprietary in nature and such technologies are established through years of dedicated in-house
R&D efforts. By virtue of the aforementioned experience, DMRL has reached a position to determine such processing
details, and to make use of such data while producing the materials at the industrial scale. A variety of aluminium
alloys has been developed and produced under the technical guidance of DMRL in the recent past for critical defence
applications that include:

   ”” BrahMos Supersonic Cruise Missile

   ”” Submarine Launched Ballistic Missile

   ”” New Generation Anti-radiation Missile

   ”” Akash Missile

   ”” Sarvatra Bridging System

   ”” Ammunition (FSAPDS and Rocket)

   ”” Futuristic Infantry Combat Vehicle

   ”” Naval Warship

   All these materials are import substitutes, and the indigenous production of these materials is associated with
significant cost savings. Today, it is with great happiness I can say confidently that indigenous aluminium alloys have
truly arrived on the Indian defence scene.

   I am glad that DESIDOC has taken the initiative of bringing out an exclusive issue of Technology Focus on
aluminium alloy technologies developed by DMRL. This issue will help document the journey and provide an update
on recent products, applications as well as initiatives, which will help both the users and the designers in an effective
manner.

                                                                                  Dr Ashim Kumar Mukhopadhyay
                                                                                                FNAE, FIMMM, FASM

                                                                    Outstanding Scientist and Associate Director
                                                                                                     DMRL, Hyderabad

2 January-February 2018             Aluminium Alloy Technologies for Advanced Defence Systems
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