Microstructure and Mechanical Characterization of X70 Steel Welded Joints Through Hardness Mapping and Tensile Strength Testing

• Autorzy: Hamdollahzadeh A. , Omidvar H. , Amirnasiri A.

Identyfikatory

DOI

10.1515/amm-2017-0301

• Języki publikacji: EN

Abstrakty

EN

In this paper, effects of preheating and type of electrode (E8010 and E8018) on microstructure and mechanical properties of 5L X70 steel welded joints were investigated. The microstructure of joint zone and fracture surface was analyzed by light optical microscope and scanning electron microscope equipped with energy dispersive spectroscopy. Hardness mapping and tensile test were also performed to find the relationship between microstructure and mechanical properties. The results showed a consistency between the hardness variation data and the microstructure of joint zone. Moreover, hardness mapping revealed coarse and fine grain subregions in the heat affected zone which were not detected in the micrographs. The tensile test indicated that the non-preheated sample, welded by cellulosic E8010, had the minimum value in the strength and the ductility of welded steel. The fractography also determined that size and distribution of strengthening phases affected the fracture mode of welded specimens.

Słowa kluczowe

EN

hardness mapping; microstructure; steel X70; tensile strength

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 4
• Strony: 2021--2027
• Opis fizyczny: Bibliogr. 21 poz., rys., tab., wykr., wzory

Twórcy

autor

Hamdollahzadeh A.

• Faculty of Mining and Materials Engineering, Amirkabir University of Technology (Aut), Tehran, Iran

autor

Omidvar H.

• Faculty of Mining and Materials Engineering, Amirkabir University of Technology (Aut), Tehran, Iran

autor

Amirnasiri A.

• Faculty of Mining and Materials Engineering, Amirkabir University of Technology (Aut), Tehran, Iran

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).