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DEVELOPMENT OF HARDNESS IN A Fe- BASED NANO-COMPOSITE ALLOY
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نویسنده
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Ahmadi S. ,Shahverdi H. R.
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منبع
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iranian journal of materials science and engineering - 2014 - دوره : 11 - شماره : 4 - صفحه:28 -32
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چکیده
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Achieving extreme hardness in the newly synthetic steel formed by converting from initial amorphous stateto subse-quent crystalline structure –named as devitrification process- was studied in this research work. results oftem observa-tions and xrd tests showed that crystallized microstructure were made up four different nano-scalephases i.e., ?-fe, fe36cr12mo10, fe3c and fe3b. more, vickers hardness testing revealed a maximum hardness of 18.6gpa which is signifi-cantly harder than existing hardmetals. detailed kinetic and structural studies have been proofthat two key factors were contributed to achieve this extreme hardness; supersaturation of transition metal alloyingelements (especially nb) and also reduction in the structure to the nano-size crystals.
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کلیدواژه
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Transmission electron microscopy (TEM) ,Nano composites ,X-ray diffraction (XRD)
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آدرس
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Materials and Biomaterials Research Center, Biomaterials Group, Tehran, Iran., ایران, tarbiat modares university, ایران
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Authors
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