Superplasticity-Current Status and Future Potential Volume 601. Symposium Held November 29-December 1, 1999, Boston, Massachusetts, USA

摘要

This volume contains papers presented at Symposium HH, 'Superplasticity- Current Status and Future Potential', at the 1999 MRS Fall Meeting in Boston, Massachusetts. Superplasticity refers to the ability of a crystalline material to exhibit large strains when pulled in tension. This phenomenon is of academic interest, but it also has a considerable industrial potential because it provides the capability for the forming of complex parts from sheet metals. The only other Materials Research Society symposium dealing exclusively with superplasticity was held at the 1990 MRS Spring Meeting in San Francisco. The proceedings of that symposium were published as Volume 196 in the Materials Research Society symposium proceedings series, and was edited by Merrilea J. Mayo, Masaru Kobayashi, and Jeffrey Wadsworth. The incentive for organizing the present symposium was the recognition that there have been several significant developments in the field of superplasticity over the last decade. New techniques have recently become available for the production of materials with ultrafine grain sizes, typically in the submicrometer or nanometer range. These materials provide at least the potential for utilizing superplastic forming capabilities at much faster strain rates. and thereby expanding the technology from the current fabrication of low-volume high-value components into high-volume commercial applications. Furthermore, there have been several major advances in the techniques available for microstructural characterization including, for example, the use of high-resolution electron microscopy and computer-aided electron backscatter pattern analysis. Several papers in this symposium describe results obtained using these new procedures.