Investigation of hardness Hall-Petch relationship in the stir zone of fiction stir welds between austenitic stainless steel and plain carbon steel

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JAFARZADEGAN MOSTAFA

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Paper Information

Journal: METALLURGICAL ENGINEERING Year:2018 | Volume:21 | Issue:1 (69) Page(s): 46-53

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Title

Investigation of hardness Hall-Petch relationship in the stir zone of fiction stir welds between austenitic stainless steel and plain carbon steel

Author(s)

JAFARZADEGAN MOSTAFA | Issue Writer Certificate

Keywords

Dissimilar Friction Stir WeldingQ1

MicrostructureQ2

HardnessQ2

Hall-Petch Relationship.Q1

Abstract

Friction stir welding is a new and effective method for joining the alloys with welding problems and also for the dissimilar alloys. In the present study, friction stir welding is used to join st37 low carbon to AISI 304 stainless steel plates at different tool rotation speeds. The stir zone in AISI 304 stainless steel shows evidence of dynamic recrystallization with a moderate dislocation density. The stir zone in st37 steel appears to experience dynamic recrystallization too, although the allotropic transformation during cooling cycle of the welds removes the features of dynamic recrystallization and produces a fine ferritepearlite Microstructure with a low dislocation density. The relationship between Hardness and Microstructure is investigated through the Hall-Petch equation for the stir zone of both steels. The results of weighted least-squares fit also show that the average Hardness of austenite in AISI 304 steel and ferrite in st37 steel inside the stir zones has a reverse relation with Hardness according to the Hall-Petch equation. The Hardness of the base metal and the stir zones of AISI 304 stainless steel does not stand on a same Hall-Petch line that can be attributed to the relatively higher dislocations due to the dynamic recrystallization of stir zones.

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APA: Copy

JAFARZADEGAN, MOSTAFA. (2018). Investigation of hardness Hall-Petch relationship in the stir zone of fiction stir welds between austenitic stainless steel and plain carbon steel. METALLURGICAL ENGINEERING, 21(1 (69) ), 46-53. SID. https://sid.ir/paper/389074/en

Vancouver: Copy

JAFARZADEGAN MOSTAFA. Investigation of hardness Hall-Petch relationship in the stir zone of fiction stir welds between austenitic stainless steel and plain carbon steel. METALLURGICAL ENGINEERING[Internet]. 2018;21(1 (69) ):46-53. Available from: https://sid.ir/paper/389074/en

IEEE: Copy

MOSTAFA JAFARZADEGAN, “Investigation of hardness Hall-Petch relationship in the stir zone of fiction stir welds between austenitic stainless steel and plain carbon steel,” METALLURGICAL ENGINEERING, vol. 21, no. 1 (69) , pp. 46–53, 2018, [Online]. Available: https://sid.ir/paper/389074/en

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