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Specimen Geometry Effect on the Mechanical Properties of AISI 1040 Steel

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Specimen Geometry Effect on the Mechanical Properties of AISI 1040 Steel

Adnan Calika, Osman Sahinb,c, and Nazim Ucarb

aDepartment of Mechanical Education, Technical Education Faculty, Suleyman Demirel University, Isparta, Turkey

bPhysics Department, Art and Science Faculty, Suleyman Demirel University, Isparta, Turkey

cPresent address: Physics Department, M. Kemal University, Hayat, Turkey Reprint requests to N. U.; E-mail: nazmucar@yahoo.com

Z. Naturforsch.63a,448 – 452 (2008); received January11, 2008

The specimen geometryeffect on some mechanical properties, such as tensile behaviour and hard- ness, of borided and unborided AISI 1040 steels was investigated. Boronizing of steels was performed bythe powder pack method at 1210 K for 4 h. The specimen geometryand the boride layer thick- ness and hardness is similar for all tested boronized steels and independent of varying the shape of cross-sections. On the other hand, the ultimate tensile stress and elongation depend on the specimen geometrydue to stress concentration at the corners of the specimen.

Key words:Boronizing; Borides; Microhardness; Ultimate Stress; Cracks.

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