Carl Koch

Professor

Carl Koch was a research group leader with the Metals and Ceramics Division of Oak Ridge National Laboratory before he joined the NCSU faculty in 1983.

Koch’s research in recent years has focused on the synthesis, characterization and properties of metastable materials. Metastable materials with unique structures or microstructures that we have studied include metallic glasses, intermetallic compounds, nanocrystalline materials and polymer alloys. The chief nonequilibrium processing methods used to prepare metastable materials are rapid solidification from the liquid phase (at about 106 oC/s) and mechanical attrition of powders in high-energy ball mills. Koch was the first researcher to demonstrate that amorphous alloys metallic glasses could be made by ball milling certain elemental powder mixtures by the technique known as mechanical alloying. Recent research has turned to nanocrystalline materials prepared by either mechanical attrition or controlled crystallization of amorphous precursors formed by rapid solidification. His group’s interest in these materials is due to their special mechanical and soft magnetic properties.

Publications

Cryogenic reciprocating torsion induced nanoscale precipitation in aluminum wire with exceptional strength and electrical conductivity
Cai, S. L., Li, D. Q., Liu, S. C., Si, J. J., Gu, J., Zhou, L. X., … Koch, C. C. (2022), MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 860. https://doi.org/10.1016/j.msea.2022.144276
Multiple gradient structures driving higher tensile strength and good capacity to absorb e d energy in aluminum wire processed by cryogenic pre-torsion
Cai, S. L., Li, D. Q., Liu, S. C., Cheng, Y. F., Li, J. H., & Koch, C. C. (2022), SCRIPTA MATERIALIA, 210. https://doi.org/10.1016/j.scriptamat.2021.114436
Synergistic effect of Nb and Zr additions on the structure-property relationships of nanocrystalline Cu processed by mechanical alloying and hot pressing
Roy, D., Chakraborty, S., Gupta, A. K., BasuMallick, A., Scattergood, R. O., & Koch, C. C. (2021), JOURNAL OF ALLOYS AND COMPOUNDS, 854. https://doi.org/10.1016/j.jallcom.2020.157174
Thermal stability and mechanical properties of Fe-Cr-Zr alloys developed by mechanical alloying followed by spark plasma sintering
Muthaiah, V. M. S., Koch, C. C., & Mula, S. (2021), JOURNAL OF ALLOYS AND COMPOUNDS, 856. https://doi.org/10.1016/j.jallcom.2020.158266
Dual gradient microstructure to simultaneously improve strength and electrical conductivity of aluminum wire
Cai, S. L., Wan, J. C., Hao, Y. J., & Koch, C. C. (2020), MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 783. https://doi.org/10.1016/j.msea.2020.139308
Grain refinement induced friction reduction and anti-wear performances of electrodeposited graphene/Ni composites with low content reduced graphene oxide
Liu, Y., Zheng, F., Wu, Y., Koch, C. C., Han, P., Zhang, C., … Zhang, Y. (2020), JOURNAL OF ALLOYS AND COMPOUNDS, 826. https://doi.org/10.1016/j.jallcom.2020.154080
Synergistic effect of Nb and Zr addition in thermal stabilization of nano-crystalline Cu synthesized by ball milling
Roy, D., Chakraborty, S., Gupta, A. K., Mallick, A. B., & Koch, C. C. (2020), MATERIALS LETTERS, 271. https://doi.org/10.1016/j.matlet.2020.127780
Tuning heterostructures with powder metallurgy for high synergistic strengthening and hetero-deformation induced hardening
Li, Z. K., Fang, X. T., Wang, Y. F., Jiang, P., Wang, J. J., Liu, C. M., … Koch, C. C. (2020), MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 777. https://doi.org/10.1016/j.msea.2020.139074
Achieving Gradient Martensite Structure and Enhanced Mechanical Properties in a Metastable beta Titanium Alloy
Ma, X., Li, F., Sun, Z., Hou, J., Fang, X., Zhu, Y., & Koch, C. C. (2019), METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 50A(5), 2126–2138. https://doi.org/10.1007/s11661-019-05157-5
Effect of B on the thermal stabilization of cryomilled nanocrystalline Cu–Al alloy
Sikdar, K., Mahata, A., Chakravarty, S., Atwater, M. A., Roy, D., & Koch, C. C. (2019), Materialia, 5, 100253. https://doi.org/10.1016/J.MTLA.2019.100253

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Carl Koch