Deformation Processes Laboratory

Lab Links


Lead Investigators

Paul Dawson

Matt Miller

Contact Us: webadministrator

strain pole figures The focus of our research in the Deformation Processes Laboratory is on quantifying our understanding of the link between the structure of engineering materials and their performance in design applications.  Our work includes the development of both experimental and simulation techniques, with special attention to coordinating the two to best reach our objectives. We work primarily on polyphase engineering alloys that have application as structural materials in airframes, ships, automobiles and engines. Critical properties, ranging from stiffness to strength to failure, stem from the crystalline structure of these alloys.  Establishing a quantitative connection between the structural features at this scale and the macroscopic properties is vital to most effectively using them. Our methodologies attempt to build these connections.

U-Bend specimen
The modeling tools we are developing include ones to represent the material structure and to simulate the mechanical response of samples of the material to both static and cyclic loading. We concentrate on finite element methods that explicitly represent the crystalline structure and compute properties from it. The experimental methods under development involve the use of x ray and neutron diffraction as a means to measure responses at the crystal level. Mechanical loading is applied in situ so that response are interrogated while the deformation processes are ongoing. The ability to both model materials from the crystal scale and to measure their behaviors at the corresponding level provide unique opportunities to advance our understanding of the relation between properties and structure. simulated deformed copper/iron specimen

We also apply our simulation and experimental tools to several forming processes. Structural alterations can be the intended outcome of processing or can be the inevitable result of processes carried out for other reasons. In either case, processing is a key element in modifying the structure that eventually determines properties. We have been developing methods for analyzing the thermomechanical histories in bulk forming and sheet forming processes. In addition we are particularly interested in solid state joining processes, such as friction stir welding, where the combined influences of high temperature and severe deformation provide major challenges for our tools.

student examining load frame developed for in situ loading Check out the links on the sidebar to explore our program:

Projects: Brief summaries of the major research projects in the lab, with links to pdf reports

Participants: Names and information on the faculty, staff and students involved in the lab

Publications: Bibliography of important papers that resulted from our research

Collaborators: Facilities at Cornell and other research centers that help with our work

Alumni: Previous doctoral students, post-doctoral research associates and visitors to the lab

Links: Information on the graduate student program and student life in Ithaca

Sibley School of Mechanical and Aerospace Engineering