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HASTELLOY Ni-basedC-22HSTM Superalloy

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HASTELLOY Ni-basedC-22HSTM Superalloy

Advanced Neutron Scattering netWork for Education and Research (ANSWER) International Materials Institutes (IMI), DMR 0231320

P. K. Liaw, H. Choo, and E-W. Huang, The University of Tennessee, USAInternational Collaborators: E. C. Oliver, Rutherford Appleton Laboratory, UK

Domestic Collaborators: B. Clausen and D. W. Brown, Los Alamos National Lab, USA; D. L. Klarstrom, Haynes International, Inc., USA

Studying Mechanical Behavior of Advanced Structural MaterialsMotivation The fatigue-behavior study is essential for structural-

integrity analyses. Fatigue properties are widely applied to predict/estimate the life of the materials used in the transportation industry, such as bridges and jet engines.

The atomic and microscopic mechanisms on the degradation of the mechanical behavior in the advanced materials, including bulk-metallic glasses, nanomaterials, and superalloys, remain unclear.

The synergistic international collaborations using the in-situ neutron and high-energy X-ray diffraction

techniques reveal the effect of stresses on microstructural evolutions.

Research Efforts The quantitative characterization at the multi-scale

microstructural levels is necessary to understand the plastic deformation, stress states, and materials performance.

In-situ neutron-diffraction experiments examine (1) the dislocations dynamics and (2) the fracture mechanics of structural and engineering materials.

Impact The experiments and theories help us improve the

reliability and performance of structural components and develop new materials.

Fatigue-Life Prediction Fatigue-Life Prediction For BridgesFor Bridges -0.01 0.00 0.01

Str

ess

(MP

a)

Fatigue hysteresisloop within 1 cycle

Macroscopic Strain

In-Situ Neutron Measurements

0

HASTELLOY Ni-basedC-22HSTM Superalloy -400

+400

-0.01 0.00 0.01-0.01 0.00 0.01

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ess

(MP

a)

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In-Situ Neutron Measurements

0

HASTELLOY Ni-basedC-22HSTM Superalloy -400

+400

Engine-Life PredictionEngine-Life PredictionFor Airplanes For Airplanes

International Materials Institutes (IMI), DMR 0231320 Advanced Neutron Scattering netWork for Education and Research (ANSWER)

P. K. Liaw and H. Choo, The University of Tennessee, USA

Web-Based Education: ANSWER organizes

tutorial workshops and short courses, which are

available on the internet for the public access.

Internet EducationInternet Education, IMI-ANSWER, IMI-ANSWER WebsiteWebsite, , University of TennesseeUniversity of Tennessee

IMI-IMI-ANSWERANSWER

, , FellowshFellowsh

ip ip ProgramProgram

ssPromotions and Activities The fellowship programs are

advertised in journals and conferences, such as the 2006 Materials Research Society (MRS) Fall Meeting.

The ANSWER-supported publications are 10 (2003), 11 (2004), 21 (2005), 61 (2006), and 36 (2007, Sept.).

Outreach ProgramsOutreach Programs, IMI-ANSWER, , IMI-ANSWER, University of TennesseeUniversity of Tennessee

Professor Tamás Ungár, Eötvös University, Budapest, Hungary, taught students at the 2007 ANSWER Summer School. The lectures are available on-line.

Lecturers from overseas taught students from institutions worldwide. The courses and handouts were live broadcasted and are archived on-line.

IMI High-School, Female and Minority Students Programs, and Neutron Schools The availability and new capabilities of the Spallation Neutron Source (SNS) at Oak Ridge, Tennessee,

have been communicated to high-school, female and minority students.

The IMI-ANSWER neutron schools, courses, tutorials, workshops, and booths at conferences have

educated students, postdocs, and faculty worldwide.

MSE 676: Advanced Topics in Materials Science and EngineeringNeutron Diffraction: Fundamentals and Applications

MSE 676: Advanced Topics in M aterials Science and Engineering

Neutron Diffraction : Fundam enta ls and Applica tions

Presented by Prof. Aaron Krawitz

University of Missouri

NeutronNeutron --Scattering CourseScattering Course

MSE 676Neutron Diffraction

Fundamental and Applications

http:// answer.utk.edu