MESAM-Dr. Karaman

MESAM RESEARCH GROUP

"Microstructural Engineering of Structural and Active Materials"

Group Supervisor:

Dr. Ibrahim Karaman, Associate Professor

The Dietz Career Development Professor I

Texas A&M University, Department of Mechanical Engineering

The main focus areas of our research group are processing-microstructure-mechanical property relationships in advanced metallic materials, severe plastic deformation, martensitic phase transformation, deformation twinning and micro-mechanical constitutive modeling of deformation mechanisms. The materials currently under investigation are:

                            1. Conventional Shape Memory Alloys (Ni-Ti)
                            2. High Temperature Shape Memory Alloys (Ni-Ti-Hf, Ni-Ti-Pd, Ni-Ti-Pt)
                            3. Ferromagnetic Shape Memory Alloys (Co-Ni-Al, Co-Ni-Ga, Ni-Mn-(Ga,In, Co) and Fe-Co-Ni-Ti)
                            4. Bulk Metallic Glasses and Composites (Vitreloys and their composites)
                            5. Bulk Nanocrystalline Materials (Ti, Nb, Mg, Al, Cu and their alloys, Stainless Steel and NiTi)
                            6. Austenitic Steels (Hadfield Steel and Stainless Steels)
                            7. Interstitial Free (IF) Steels

We use the following tools in investigation of these materials:

· Materials Synthesis and Processing (Vacuum arc melting, Equal Channel Angular Extrusion or Equal Channel Angular Pressing, Micro and Nano Powder Consolidation, rolling, wire drawing, etc.)

· Mechanical Testing (Monotonic and cyclic testing of single crystals and polycrystals at temperatures from -100 ºC up to 1000 ºC)

· Microstructural investigations (Optical microscopy, SEM, TEM, X-Ray, OIM)

· Modeling (Microstructure evolution based crystal plasticity models)

The group's research is funded by several funding agencies such as NSF - CMII, NSF - DMR, NSF - EEC, ARO, ONR, NASA, and The U.S. CRDF.

Our group has an extensive national and international collaboration with the scientists from Ames and Los Alamos National Laboratories (Dr.s Iver Anderson, Carlos N. Tome, Irene Beyerlein), NASA – Glenn Research Center (Dr. Ron Noebe), University of Paderborn in Germany (Prof. Hans J. Maier), and from Siberian Physical and Technical Institute of Russia (Prof. Yuriy I. Chumlyakov and Dr. Irina Kireeva).

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