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the failiur analysis of nb-microalloyed δ-trip steel
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نویسنده
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gholami shiri s. ,palizdar y. ,jenabali jahromi s. a. ,monlevade e. f.de
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منبع
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iranian journal of materials science and engineering - 2018 - دوره : 15 - شماره : 3 - صفحه:32 -42
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چکیده
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The relation between microstructure and the fracture mechanisms of δ-trip steel with different nb-content has been investigated using complementary methods of light microscopy, sem, eds, ebsd, x-ray phase analysis and tensile test. the results revealed a close dependency between the presences of constitutive phases i.e. ferrite, bainite, retained austenite and martensite and the mode and characteristics of fracture. all samples revealed almost different fractography pattern which could be associated to the effect of nb microalloying element. the different fractography patterns were consisted of dimple rupture, riverside and wallner lines pattern. the proportion of the cleavage fracture in comparison of dimple rapture increased by increasing the nb-content due to the increase of primary martensite in the microstructure.
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کلیدواژه
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δ-trip steel ,high al steel ,fracture mode ,fractography ,nb-microalloyed
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آدرس
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shiraz university, school of engineering, department of materials science and engineering, iran. pars special economic energy zone, damavand petrochemical company, phase 2, iran, materials and energy research center, nanotechnology and advanced materials department, iran, shiraz university, school of engineering, department of materials science and engineering, iran, university of são paulo, polytechnic school, department of metallurgical and materials engineering, brazil
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Authors
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