International Materials Institute: Advanced Neutron Scattering netWork for Education and Research (ANSWER)

Peter Liaw, University of Tennessee, DMR 0231320

IMI-ANSWER-Japan Research Collaborations on Bulk-Metallic GlassesMotivation Processing and properties of bulk-metallic

glasses (BMGs) have been widely studied. However, their atomic structures still remain mysterious.

Structural models of BMGs are typically based on hard-sphere representations, which offer little direct correlation to the observed properties, such as mechanical behavior.

A further understanding of the local atomic structure of BMGs is critical for developing and manufacturing the next-generation, glass-forming alloys.

Current collaborations focus on the glass-forming ability and fatigue behavior of BMGs.

Research Efforts with Dr. Y. Yokoyama and

President A. Inoue, Tohoku University, Sendai Designing and fabricating BMGs. Using the neutron diffraction on the Neutron Powder

Diffractometer (NPDF) at the Los Alamos National Laboratory and Small Angle Neutron Scattering (SANS) at the National Institute of Science & Technology (NIST) to study the atomic structures.

Applying computational simulations to understand the mechanisms.

Impact The collaborations develop new materials and study their

properties and potential applications.

The number of IMI-ANSWER-Japan collaborators’ publications is 14.

Fatigue Specimen

Sparkling PhenomenonG. Y. Wang et al. / Intermetallics 12 (2004),1219-1227.

LoadingDirection

4mm

The fifth International Bulk-Metallic Glasses Conference at Awaji, 2006

International Materials Institute: Advanced Neutron Scattering netWork for Education and Research (ANSWER)

Peter Liaw, University of Tennessee, DMR 0231320

International Research Network

IMI-ANSWER organizes symposia and

workshops to develop the partnerships among

Japanese, other Asia countries’, European, and

US research societies.

IMI-ANSWER IMI-ANSWER Student Student

ExchangeExchangeProgramProgram

IMI-ANSWER Students Visited Japan Mr. J. J. Wall visited the Japan

Ultrahigh Temperature Materials Research Laboratory (JUTEM) at Tajimi, Gifu.

Dr. M. L. Morrison and Dr. W. Peter conducted the joint research on BMGs at Tohoku University.

IMI-ANSWER IMI-ANSWER Visiting Scholar ProgramVisiting Scholar Program

Dr. Y. Morii of the Japan-Spallation Neutron Source introduced the industrial application of neutron at the Japan Research Reactor - No. 3 (JRR-3) and the Japan Proton Accelerator Research Complex (JPARC) to the US and international participants in NST2, 2007.

IMI-ANSWER hosted the Neutron Stress, Texture, and Phase Transformation Workshop (NST2) at the Spallation Neutron Source, Oak Ridge, Tennessee, US, 2007. Speakers from overseas interacted with participants from institutions worldwide. Please refer to ANSWER website at http: answer.utk.edu.

Dr. Y. Yokoyama of Tohoku University

visited University of Tennessee, 2007. Dr. C. Fan of University of Tennessee

fabricated bulk-metallic glasses at Tohoku

University, 2006.

Partnership Development & Exchange Program with Japan

Spallation Neutron Source, Oak Ridge, TN, US

Mr. J. J. WallNST2 Workshop, 2007IMI –ANSWER Symposia & IMI –ANSWER Symposia &

WorkshopsWorkshops

Structural analyses of

protein crystals

and fuel- cell

materials

J-PARC

JRR-3

&