Phase transformations in thermal copper-tin alloys

The crystal structure and transformation behaviour of different phases in copper-tin alloys having 10-44% of tin, have been examined using mainly X-ray powder diffraction techniques on heat-treated alloys, supplemented by metallographic studies. The present investigation reveals some interesting information on b-g phase transformation behaviour of copper-tin alloys, and also on the complex nature of the crystal structure of g phase. (Shri G. Basu, Junior Scientific Assistant, Dr. J.K. Mukherjee, Scientist, and Dr. T. Banerjee, Scientist, Emeritus, National Metallurgical Laboratory, Jamshedpur)