Dayton Chapter Scholarship Night
An Overview of Titanium Alloys Modified with Boron
Dr. Dan Miracle
Air Force Research Laboratory, Materials and Manufacturing Directorate
Location:
5:30
p.m. Social
Chantrells Restaurant
6:30
p.m. Dinner ($20.00, Students: FREE) 20
Commercial Way
7:30
p.m. Program
Springboro, Ohio
937-743-6073
For Reservations: Menu:
Call Chuck Woods 937-236-8315 French onion ribeye
E-mail: cwoods@globalms.com Veggie Lasagna, Buttered corn
On-line: http://www.asm-dayton.org Redskin Mashed Potato, Fresh Mashed
By 3:00 p.m. Monday, May 21, 2007 7-layer salad, Green Beans Almandine, Appetizer
Rolls, Seasonal pies and Cakes,
Beverage
ABSTRACT
Sesh Tamirisa and Dan Miracle: Titanium alloys continue to be vital structural materials. There is a strong motivation to develop titanium technologies that can reduce the processing costs and increase the performance of conventional titanium alloys. Research in the past two decades revealed that small boron additions to titanium alloys show significant promise in this direction. The potential of boron-modified titanium (Ti-B) alloys for fracture-sensitive applications is being critically assessed at the US Air Force Research Laboratory (AFRL). The physical metallurgy of the material system will be briefly described, including compositions, phases, processing, microstructures, and properties. Distinction will be made between Ti-B alloys modified with trace and modest boron levels. Trace (~0.1 wt.%) boron addition significantly refines the cast grain size by an order magnitude, which provides important opportunities for as-cast products. The grain refinement could also lead to reduction/elimination of processing steps that could lead to novel and affordable processing paths. Addition of boron of the order of 1 wt%, on the other hand, significantly increases the strength and stiffness of conventional Ti alloys while retaining good fracture related properties. Better understanding of the processing-microstructure-property-performance relationships has been found to be the key in the development of Ti-B alloys for aerospace applications where fatigue and damage tolerance are critical factors. Research and development programs currently underway at the AFRL, aimed at exploring and establishing the effects of boron addition to Ti alloys will be presented.
SPEAKER BIO
Dr. Dan Miracle, Air Force Research Laboratory
Dr. Dan Miracle is a Senior Scientist in the Materials and Manufacturing Directorate of the Air Force Research Laboratory. Research interests include basic studies of nanocrystalline and amorphous metals and boron-modified titanium. Dr. Miracle received a B.S. degree in Materials Science from Wright State University; M.S. and Ph.D. degrees in Metallurgical Engineering from Ohio State University, and an Honorary Doctor of Science from the Institute of Metal Physics, Ukrainian Academy of Sciences. Additional positions include Senior Visiting Fellow at Cambridge University, Adjunct Faculty of Wright State University, and Scientific Officer at the AF Office of Scientific Research. Dr. Miracle is a Fellow of ASM, International and a Fellow of the Air Force Research Laboratory. He is an Eminent Engineer of the Tau Beta Pi Society, and is a member of ASM, TMS, MRS and Alpha Sigma Mu International Metallurgical Honor Society. Dr. Miracle received the AF Basic Research Award, the AF Scientific Achievement Award, and was co-recipient of the DoE Outstanding Scientific Accomplishment award. He is author or co-author of over 130 articles and 6 chapters, and is co-editor of 5 books, including Composites, Volume 21 of the ASM Handbook series.