Foreword
- PDF / 96,420 Bytes
- 2 Pages / 594 x 774 pts Page_size
- 43 Downloads / 198 Views
A resurgence of interest in bainitic transformations and in the resulting structure/property relationships led to the programming of an International Conference on the subject--held on September 26 and 27, 1988, during the World Materials Congress in Chicago. The idea for organizing such a world meeting on bainite originated at the 1986 International Conference on Martensitic Transformations in Japan and arose because of the circumstance that displacive features are exhibited by bainitic as well as martensitic transformations. Moreover, it was noted that, particularly in Japan and China, increasing attention was being given to the favorable mechanical properties of bainitic structures in high-strength, low-alloy steels. Subsequently, an International Committee on Bainite (as listed below) was appointed to plan and administer an International Conference on Bainite. The Conference was designed to attract papers on the following three aspects of the overall topic: 1. What is the essential nature of bainitic transformations, including mechanisms, crystallography, and kinetics, and what are the necessary and sufficient characteristics that define a bainitic transformation? 2. What is the basic nature of bainitic transformation products, especially in steels, distinguishing (if germane) between the directly formed product and that usually observed after some further exposure to the time/temperature conditions of the transformation? This question pertains to the morphologies, constituent phases, substructures, and terminologies that relate to bainit'ic microstructures. 3. What are the relationships between bainitic structures and their properties, especially in steels, recognizing that other microconstituents, such as martensite or retained austenite, may also be present? The papers presented orally at the International Conference were grouped according to these three themes, and this rationale has also been attempted in sequencing the published papers. However, because of the time variations in review and response procedures, it became necessary to publish the accepted papers in two issues of Metallurgical Transactions. Although important differences of viewpoint on the foregoing key questions still remain, the papers appearing herewith undoubtedly constitute a most valuable and timely resource on the subject of bainite and its relevant aspects. One can surely look ahead now to a further refinement of the prevailing differences of opinion, together with some emerging international agreement on the terms and definitions that apply to bainitic transformations and their products. The International Committee wishes to express its sincere appreciation to the authors, reviewers, and staff personnel who participated in the International Conference on Bainite and the ultimate publication in Metallurgical Transactions of the contributed papers. International Committee on Bainite
N.F. Kennon, Australia Toru Araki, Japan G.R. Purdy, Canada J.W. Christian, United Kingdom V.M. Schastlivtsev, U.S.S.R. Erhard Hornbogen, Federal Republ
