DETERMINATION OF RESIDUAL STRAINS WITH CBED LACBED TECHNIQUES/

The obvious residual strains were observed at the interface of Gr(C)/M g composite. The lattice parameters in the strained area were determin ed by fitting the distances between a projecting center and HOLZ lines in CBED patterns with the least square method. Because it is difficul t to ascertain the accurate position of the projecting center, an expe rimental center was set up and its coordinates relative to the project ing center were introduced as system parameters. In addition, an analy sis of the distribution of the residual strains in the interface and m atrix was carried out with the LACBED technique.