Effect of ultrasonic nanocrytalline surface modification on the microstructural evolution of inconel 690 alloy

Kejian Li; Yinsheng He; In Shik Cho; Chang Soon Lee; In Gyu Park; Jung Il Song; Cheol Woong Yang; Je Hyun Lee; Keesam Shin

doi:10.1080/10426914.2014.921694

Effect of ultrasonic nanocrytalline surface modification on the microstructural evolution of inconel 690 alloy

Kejian Li
, Yinsheng He
, In Shik Cho
, Chang Soon Lee
, In Gyu Park
, Jung Il Song
, Cheol Woong Yang
, Je Hyun Lee
, Keesam Shin

Department of Advanced Materials Science and Engineering

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

12 Scopus citations

Abstract

Specimens of Inconel 690 were investigated after ultrasonic nanocrystalline surface modification (UNSM) using microhardness tests, electron backscattered diffraction, and transmission electron microscopy (TEM). After UNSM treatment, a 60% increase of hardness up to ∼310 μm in depth was observed. Layer-by-layer TEM analysis showed well-refined grains and twins in addition to the high dislocations density. The mechanism of the microstructure refinement was attributed to the development of nano-grains, twin structures, and dislocations.

Original language	English
Pages (from-to)	194-198
Number of pages	5
Journal	Materials and Manufacturing Processes
Volume	30
Issue number	2
DOIs	https://doi.org/10.1080/10426914.2014.921694
State	Published - 1 Feb 2015

Keywords

Microstructure
Nanocrystalline
Superalloy
TEM
UNSM

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10.1080/10426914.2014.921694

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title = "Effect of ultrasonic nanocrytalline surface modification on the microstructural evolution of inconel 690 alloy",

abstract = "Specimens of Inconel 690 were investigated after ultrasonic nanocrystalline surface modification (UNSM) using microhardness tests, electron backscattered diffraction, and transmission electron microscopy (TEM). After UNSM treatment, a 60\% increase of hardness up to ∼310 μm in depth was observed. Layer-by-layer TEM analysis showed well-refined grains and twins in addition to the high dislocations density. The mechanism of the microstructure refinement was attributed to the development of nano-grains, twin structures, and dislocations.",

keywords = "Microstructure, Nanocrystalline, Superalloy, TEM, UNSM",

author = "Kejian Li and Yinsheng He and Cho, \{In Shik\} and Lee, \{Chang Soon\} and Park, \{In Gyu\} and Song, \{Jung Il\} and Yang, \{Cheol Woong\} and Lee, \{Je Hyun\} and Keesam Shin",

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doi = "10.1080/10426914.2014.921694",

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T1 - Effect of ultrasonic nanocrytalline surface modification on the microstructural evolution of inconel 690 alloy

AU - Li, Kejian

AU - He, Yinsheng

AU - Cho, In Shik

AU - Lee, Chang Soon

AU - Park, In Gyu

AU - Song, Jung Il

AU - Yang, Cheol Woong

AU - Lee, Je Hyun

AU - Shin, Keesam

PY - 2015/2/1

Y1 - 2015/2/1

N2 - Specimens of Inconel 690 were investigated after ultrasonic nanocrystalline surface modification (UNSM) using microhardness tests, electron backscattered diffraction, and transmission electron microscopy (TEM). After UNSM treatment, a 60% increase of hardness up to ∼310 μm in depth was observed. Layer-by-layer TEM analysis showed well-refined grains and twins in addition to the high dislocations density. The mechanism of the microstructure refinement was attributed to the development of nano-grains, twin structures, and dislocations.

AB - Specimens of Inconel 690 were investigated after ultrasonic nanocrystalline surface modification (UNSM) using microhardness tests, electron backscattered diffraction, and transmission electron microscopy (TEM). After UNSM treatment, a 60% increase of hardness up to ∼310 μm in depth was observed. Layer-by-layer TEM analysis showed well-refined grains and twins in addition to the high dislocations density. The mechanism of the microstructure refinement was attributed to the development of nano-grains, twin structures, and dislocations.

KW - Microstructure

KW - Nanocrystalline

KW - Superalloy

KW - TEM

KW - UNSM

UR - https://www.scopus.com/pages/publications/84919718924

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DO - 10.1080/10426914.2014.921694

M3 - Article

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SN - 1042-6914

VL - 30

SP - 194

EP - 198

JO - Materials and Manufacturing Processes

JF - Materials and Manufacturing Processes

IS - 2

ER -

Effect of ultrasonic nanocrytalline surface modification on the microstructural evolution of inconel 690 alloy

Abstract

Keywords

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