Accelerated Metals Development by Computation

There are two foci to this program, the first promoting and developing a strong interaction between scientists and technologists at AFRL and faculty, post-doctoral fellows and research students comprising the team based at the Ohio State University (OSU), and the second involving research aimed at furthering the ability to accelerate the maturation and insertion of materials, specifically metals and alloys of interest to the Air Force. The overall technical theme, namely accelerated metals development, represents a problem of tremendous interest to the Air Force. In the following, the modification to the existing effort, aimed at continuing the efforts of the CCMD, is described.

The program of research that has been developed under this Cooperative Agreement has been extremely successful regarding the meeting of its objectives. Thus, not only has the interaction between personnel from both sides (i.e., academia and the Air Force) been established and promoted but the technical effort has yielded several notable successes. The present proposal is for a one year extension of the research effort together with the acquisition of equipment necessary for the execution of the proposed research program. In terms of the proposed extension, it will provide resources for further development of the modeling effort associated with the accelerated maturation of materials – the underpinning feature of the technical aim of the collaborative agreement. Key to the success of this program of research is access to state-of-the-art equipment. To this end, a request is made for several items of equipment for materials characterization (described below), to be purchased with Air Force and cost-sharing funds.

The continuing technical effort involves four new tasks, all of which make contributions to the general theme of the accelerated maturation/insertion of materials. The continuing tasks are as follows:

Task I: Development of Mechanistic Models for the Accelerated Insertion of Corrosion Resistant Structural Components (Rudy Buchheit (OSU) and Kumar Jata (AFRL))

Task II: Influence of the Anisotropic Nature of Microstructure on Properties (Hamish Fraser (OSU) and Dan Evans and Michael Uchic (AFRL))

Task III: Development of Phase Field Engineering Models of Microstructural Evolution in Ni-Based Superalloys (Yunzhi Wang (OSU) and Jeff Simmons (AFRL))

Task IV: Development of Image-Based Crystal Plasticity Computational Models for Fatigue Analysis (Somnath Ghosh (OSU), Dennis Dimiduk (AFRL) and Mike Uchic (AFRL))

Task V: Accelerated Assesment and Representation of Materials Behavior via Integrated Electron-Optical, Focused Ion beam and MEMS-based Characterization Methods (Hamish Fraser and Michael Mills (OSU) and Dennis Dimiduk and Michael Uchic (AFRL))

Task VI: Physically-based Monte-Carlo Models of Grain Growth and Texture Evolution (Anthony Rollett (CMU) and Lee Semiatin (AFRL))

Task VII: Development of Microstructurally-Based Models for the Prediction of the Fatigue Response in Ti Alloys (Michael Mills and Hamish Fraser (OSU) and James Larsen (AFRL))

Task VIII: Development and Characterization of High Temperature Titanium Alloys for High Mach Aerospace Structural Applications (Hamish Fraser, James Williams, OSU Faculty Members; Daniel Evans, Patrick Martin, AFRL Mentors)