Pulse-Inversion Chirp-Coded Weld Harmonic Imaging (PI-CWHI) of friction stir welded butt-joint

M. Tabatabaeipour; J. Hettler; N. T. Sewell; J. R. Wright; J. C. S. Wright; S. Delrue; K. Van Den Abeele

doi:10.1007/s10921-017-0437-1

Pulse-Inversion Chirp-Coded Weld Harmonic Imaging (PI-CWHI) of friction stir welded butt-joint

M. Tabatabaeipour, J. Hettler, N. T. Sewell, J. R. Wright, J. C. S. Wright, S. Delrue, K. Van Den Abeele

Electronic And Electrical Engineering

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

2 Citations (Scopus)

Abstract

The microscopic size and the closed characteristics of zigzag line defects at the root of friction stir welded joints frequently result in a detection inability by off-the-shelf ultrasonic weld inspection techniques. To overcome this problem, we take advantage of a non-linear ultrasonic approach by employing a slanted contact pitch-catch mode scanning using chirp-coded excitation with subsequent pulse-inversion analysis. We validated that the observed nonlinearity correlates well with the micro-crack density along the weld path. Doing so, hot spots in the pulse-inversion chirp-coded weld harmonic images can be interpreted as zones with high concentrations of micro-flaws.

Original language	English
Article number	75
Number of pages	10
Journal	Journal of Nondestructive Evaluation
Volume	36
DOIs	https://doi.org/10.1007/s10921-017-0437-1
Publication status	Published - 23 Oct 2017

Keywords

ultrasonic
nonlinear ultrasound
pulse-inversion
friction stir welds
FSW
kissing bond

Access to Document

10.1007/s10921-017-0437-1

Cite this

@article{ab92ec60e5ea4a87a07e45a5ba254667,

title = "Pulse-Inversion Chirp-Coded Weld Harmonic Imaging (PI-CWHI) of friction stir welded butt-joint",

abstract = "The microscopic size and the closed characteristics of zigzag line defects at the root of friction stir welded joints frequently result in a detection inability by off-the-shelf ultrasonic weld inspection techniques. To overcome this problem, we take advantage of a non-linear ultrasonic approach by employing a slanted contact pitch-catch mode scanning using chirp-coded excitation with subsequent pulse-inversion analysis. We validated that the observed nonlinearity correlates well with the micro-crack density along the weld path. Doing so, hot spots in the pulse-inversion chirp-coded weld harmonic images can be interpreted as zones with high concentrations of micro-flaws.",

keywords = "ultrasonic, nonlinear ultrasound, pulse-inversion, friction stir welds, FSW, kissing bond",

author = "M. Tabatabaeipour and J. Hettler and Sewell, {N. T.} and Wright, {J. R.} and Wright, {J. C. S.} and S. Delrue and {Van Den Abeele}, K.",

year = "2017",

month = oct,

day = "23",

doi = "10.1007/s10921-017-0437-1",

language = "English",

volume = "36",

journal = "Journal of Nondestructive Evaluation",

issn = "0195-9298",

}

TY - JOUR

T1 - Pulse-Inversion Chirp-Coded Weld Harmonic Imaging (PI-CWHI) of friction stir welded butt-joint

AU - Tabatabaeipour, M.

AU - Hettler, J.

AU - Sewell, N. T.

AU - Wright, J. R.

AU - Wright, J. C. S.

AU - Delrue, S.

AU - Van Den Abeele, K.

PY - 2017/10/23

Y1 - 2017/10/23

N2 - The microscopic size and the closed characteristics of zigzag line defects at the root of friction stir welded joints frequently result in a detection inability by off-the-shelf ultrasonic weld inspection techniques. To overcome this problem, we take advantage of a non-linear ultrasonic approach by employing a slanted contact pitch-catch mode scanning using chirp-coded excitation with subsequent pulse-inversion analysis. We validated that the observed nonlinearity correlates well with the micro-crack density along the weld path. Doing so, hot spots in the pulse-inversion chirp-coded weld harmonic images can be interpreted as zones with high concentrations of micro-flaws.

AB - The microscopic size and the closed characteristics of zigzag line defects at the root of friction stir welded joints frequently result in a detection inability by off-the-shelf ultrasonic weld inspection techniques. To overcome this problem, we take advantage of a non-linear ultrasonic approach by employing a slanted contact pitch-catch mode scanning using chirp-coded excitation with subsequent pulse-inversion analysis. We validated that the observed nonlinearity correlates well with the micro-crack density along the weld path. Doing so, hot spots in the pulse-inversion chirp-coded weld harmonic images can be interpreted as zones with high concentrations of micro-flaws.

KW - ultrasonic

KW - nonlinear ultrasound

KW - pulse-inversion

KW - friction stir welds

KW - FSW

KW - kissing bond

U2 - 10.1007/s10921-017-0437-1

DO - 10.1007/s10921-017-0437-1

M3 - Article

SN - 0195-9298

VL - 36

JO - Journal of Nondestructive Evaluation

JF - Journal of Nondestructive Evaluation

M1 - 75

ER -

Pulse-Inversion Chirp-Coded Weld Harmonic Imaging (PI-CWHI) of friction stir welded butt-joint

Abstract

Keywords

Access to Document

Fingerprint

Cite this