Texture and precipitation behavior of friction stir welded Inconel 825 alloy

Hrishikesh Das; Mounarik Mondal; Sung-Tae Hong; Ji-Woo Lee; Hoon-Hwe Cho

doi:10.1016/j.mtcomm.2020.101295

Texture and precipitation behavior of friction stir welded Inconel 825 alloy

Hrishikesh Das, Mounarik Mondal, Sung-Tae Hong, Ji-Woo Lee, Hoon-Hwe Cho

Mechanical Engineering and Design

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The microstructure, texture pattern, and precipitation behavior of friction stir butt welded Inconel 825 alloy are highlighted here. The microstructure of bright regions and black-banded regions in the stir zone (SZ) is characterized by SEM, EBSD and TEM with EDS. EBSD analysis justifies that the SZ exhibits a dynamic recrystallized structure. Grain boundary mapping corroborates the insignificant difference in the low- and high-angle grain boundaries fraction between the SZ, the thermo-mechanically affected zone, and the base metal. TEM analysis confirms the formation of nano twins and dispersion of nano-size precipitations in the grains, and at the grain boundaries as well. Grain refinement and nano-size precipitation formation in the SZ significantly enhanced both microhardness and tensile strength.

Original language	English
Article number	101295
Journal	Materials Today Communications
Volume	25
DOIs	https://doi.org/10.1016/j.mtcomm.2020.101295
Publication status	Published - 10 Jun 2020

Keywords

EBSD
Friction stir welding
Grain refinement
Inconel 825
Microstructure
Nano-size precipitation
TEM

Access to Document

10.1016/j.mtcomm.2020.101295

Cite this

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title = "Texture and precipitation behavior of friction stir welded Inconel 825 alloy",

abstract = "The microstructure, texture pattern, and precipitation behavior of friction stir butt welded Inconel 825 alloy are highlighted here. The microstructure of bright regions and black-banded regions in the stir zone (SZ) is characterized by SEM, EBSD and TEM with EDS. EBSD analysis justifies that the SZ exhibits a dynamic recrystallized structure. Grain boundary mapping corroborates the insignificant difference in the low- and high-angle grain boundaries fraction between the SZ, the thermo-mechanically affected zone, and the base metal. TEM analysis confirms the formation of nano twins and dispersion of nano-size precipitations in the grains, and at the grain boundaries as well. Grain refinement and nano-size precipitation formation in the SZ significantly enhanced both microhardness and tensile strength.",

keywords = "EBSD, Friction stir welding, Grain refinement, Inconel 825, Microstructure, Nano-size precipitation, TEM",

author = "Hrishikesh Das and Mounarik Mondal and Sung-Tae Hong and Ji-Woo Lee and Hoon-Hwe Cho",

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doi = "10.1016/j.mtcomm.2020.101295",

language = "English",

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T1 - Texture and precipitation behavior of friction stir welded Inconel 825 alloy

AU - Das, Hrishikesh

AU - Mondal, Mounarik

AU - Hong, Sung-Tae

AU - Lee, Ji-Woo

AU - Cho, Hoon-Hwe

PY - 2020/6/10

Y1 - 2020/6/10

N2 - The microstructure, texture pattern, and precipitation behavior of friction stir butt welded Inconel 825 alloy are highlighted here. The microstructure of bright regions and black-banded regions in the stir zone (SZ) is characterized by SEM, EBSD and TEM with EDS. EBSD analysis justifies that the SZ exhibits a dynamic recrystallized structure. Grain boundary mapping corroborates the insignificant difference in the low- and high-angle grain boundaries fraction between the SZ, the thermo-mechanically affected zone, and the base metal. TEM analysis confirms the formation of nano twins and dispersion of nano-size precipitations in the grains, and at the grain boundaries as well. Grain refinement and nano-size precipitation formation in the SZ significantly enhanced both microhardness and tensile strength.

AB - The microstructure, texture pattern, and precipitation behavior of friction stir butt welded Inconel 825 alloy are highlighted here. The microstructure of bright regions and black-banded regions in the stir zone (SZ) is characterized by SEM, EBSD and TEM with EDS. EBSD analysis justifies that the SZ exhibits a dynamic recrystallized structure. Grain boundary mapping corroborates the insignificant difference in the low- and high-angle grain boundaries fraction between the SZ, the thermo-mechanically affected zone, and the base metal. TEM analysis confirms the formation of nano twins and dispersion of nano-size precipitations in the grains, and at the grain boundaries as well. Grain refinement and nano-size precipitation formation in the SZ significantly enhanced both microhardness and tensile strength.

KW - EBSD

KW - Friction stir welding

KW - Grain refinement

KW - Inconel 825

KW - Microstructure

KW - Nano-size precipitation

KW - TEM

U2 - 10.1016/j.mtcomm.2020.101295

DO - 10.1016/j.mtcomm.2020.101295

M3 - Article

SN - 2352-4928

VL - 25

JO - Materials Today Communications

JF - Materials Today Communications

M1 - 101295

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