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Application of response surface methodology to optimize process parameters in friction welding of Ti-6Al-4V and ss304l rods

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Transactions of Nonferrous Metals Society of China 2015年第11期25卷 3625-3633页

作者： R.KUMAR M.BAlASUBRAMANIAN Department of Mechanical Engineering SKP Institute of Technology RMK College of Engineering and Technology

A method to decide near optimal settings of the process parameters in friction welding was *** success of the friction welding process is based on various input parameters like friction pressure,friction time,upset pressure and upset time and output parameters like tensile strength,hardness and material ***-6Al-4V and ss304l(ss) materials were joined by friction welding process using interlayer *** Box-Behnken design and response surface methodology(RSM) were applied to deciding the number of experiments to be performed and identify the optimum process parameters for obtaining better joint *** results were highly *** strength of 523 MPa was obtained at a friction pressure of 12 N/mm^2,upset pressure of40 N/mm^2,friction time of 1.2 s and upset time of 7 s.

关键词： friction welding welding parameters Ti-6Al-4V ss304l copper interlayer

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Experimental investigation of Tie6Ale4V titanium alloy and 304l stainless steel friction welded with copper interlayer

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Defence Technology（防务技术） 2015年第1期11卷 65-75页

作者： R.KUMAR M.BAlASUBRAMANIAN Mechanical Engineering SKP Institute of Technology RMK College of Engineering and Technology

The basic principle of friction welding is intermetallic bonding at the stage of super plasticity attained with self-generating heat due to friction and finishing at upset pressure. Now the dissimilar metal joints are especially popular in defense, aerospace, automobile, bio-medical,refinery and nuclear engineerings. In friction welding, some special alloys with dual phase are not joined successfully due to poor bonding strength. The alloy surfaces after bonding also have metallurgical changes in the line of interfacing. The reported research work in this area is scanty. Although the sound weld zone of direct bonding between Tie6Ale4 V and ss304 l was obtained though many trials, the joint was not successful. In this paper, the friction welding characteristics between Tie6Ale4 V and ss304 l into which pure oxygen free copper(OFC) was introduced as interlayer were investigated. Boxe Behnken design was used to minimize the number of experiments to be performed. The weld joint was analyzed for its mechanical strength. The highest tensile strength between Tie6Ale4 V and ss304 l between which pure copper was used as insert metal was acquired. Micro-structural analysis and elemental analysis were carried out by EDS, and the formation of intermetallic compound at the interface was identified by XRD analysis.

关键词： Friction welding Tie6Ale4V ss304l Oxygen free copper Interlayer Microstructure Interface

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