An accelerated methodology for the evaluation of critical properties in polyphase alloys
- PDF / 2,440,970 Bytes
- 15 Pages / 612 x 792 pts (letter) Page_size
- 23 Downloads / 183 Views
I. INTRODUCTION
AN important facet of mechanical design is the intelligent choice of materials. Effectively matching a material with its application provides for an acceptable balance of performance and cost. As the design requirements may be many, making this selection is not a trivial task. It may be further complicated by the possibility of inventing a new material instead of limiting the choice to existing materials. Historically, new applications often have provided the impetus to develop new materials. However, a design process that includes developing a new material in concert with completing the mechanical design must have both activities proceed with compatible schedules. While this was once more commonly the case, in recent years, computer-aided design tools have compressed the time required for mechanical design. The net effect is that the traditional methodologies for material development are too slow. Less frequently are new materials viable options and mechanical designs rely instead on existing materials. Unfortunately, this limits improvements in performance in comparison to design that uses new materials that have better properties. The need to expedite material development is broadly recognized and currently being addressed via a number of directed research programs. Two presumptions are made across much of this work. First, it is the mechanical properties that must be known to designers. To ascertain the properties more rapidly, a more quantitative understanding of the dependence of properties on features of the structure is essential. Second, by augmenting the traditional laboratory tools with a combination of computer modeling and nontraditional tests, the overall development time could be shortened. The methodology presented in this article is part of the overall thrust to accelerate the material development process. We are focused on the more rapid determination of the strength and stiffness of polyphase alloys. The approach embodies the presumptions discussed in the previous paragraph: the properties PAUL DAWSON, Professor, MATTHEW MILLER, Associate Professor, TONG-SEOK HAN, Postdoctoral Associate, and JOEL BERNIER, Graduate Student, are with the Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853. Contact e-mail: [email protected] This article is based on a presentation made in the symposium entitled “Three Dimensional Materials Science” during the 2003 MS&T ’03: Materials Science & Technology Conference 2003 in Chicago, Illinois, on November 11 & 12, 2003, under the auspices of the ASM/MSCTS: Materials Science Critical Technology Sector Committee and the TMS/SMD: Structural Materials Division Committee. METALLURGICAL AND MATERIALS TRANSACTIONS A
are to be determined from a combination of simulation and experiment with the aid of a quantitative association between critical features of the structure and the mechanical response. II. CONCEPTUAL BASIS OF THE DIGITAL MATERIAL SYSTEM To achieve a more rapid determination of mechanical properties, a strateg
Data Loading...
