advanced nde technologies for quality control
DESCRIPTION
Advanced NDE Technologies for Quality Control. November 9 th , 2012 Dr. Jeong Na Technology Leader NDE Group 1250 Arthur E. Adams Drive Columbus, OH 43221. Advacned NDE Technologies. Matrix Phased Array (MPA) Ultrasonics Laser Based Ultrasonics Array Eddy Current - PowerPoint PPT PresentationTRANSCRIPT
Advanced NDE Technologies for Quality ControlNovember 9th, 2012
Dr. Jeong NaTechnology LeaderNDE Group1250 Arthur E. Adams DriveColumbus, OH 43221
Advacned NDE Technologies
Matrix Phased Array (MPA) Ultrasonics
Laser Based Ultrasonics Array Eddy Current Ultrasonically Induced Thermography
Linear Phased Array UT One-Dimensional Array Configuration Line Focusing, Steering and Electronic Scanning
Focusing Steering Scanning
PiezoElements
Matrix Phased Array (MPA) Technology Provides 2-Dimensional Electronic Control of Beam:
Focusing, Steering, and Scanning
Each bar represents firing delay for each element
3-D MPA Probe Convex Surface Contour No Requirement of Steering Less Number of Elements (8x8) Lower Frequency (12 MHz)
Automotive Resistance Spot Welds Provides 2-D Image of Weld Nugget along with
Diameter and Area Information
6 mm RSW
ScreenShot
Probability of Detection (POD) Nugget Size Ranged between 4 - 6 mm for Two 0.7 mm Sheets One Hundred Weld Samples Approximately 98% Accuracy in Sizing
Weld Nugget Diameter(0.7 mm Thickness)
0.0
2.0
4.0
6.0
8.0
10.0
0.0 2.0 4.0 6.0 8.0 10.0
Avg. Peel/Chisel Destructive Test Dia. (mm)
Avg.
UT
Dia
. (m
m)
UT vs Destructive
Ideal
95% LUS
Laser Based Ultrasonics
• Non-contact• Fast Scan• Complex Geometries• Hostile Environments• High Spatial Resolution
• Versatile – Very small to Very Large Parts
1. Laser Generation2. Laser Detection3. Hardware, electronics, computers
Elastic Waves
VL > VS > VRSound Velocity:
Weld Joint Inspection
Levesque et.al. “Defect Detection and Residual Stress Measurement in Friction Stir Welds using Laser Ultrasonics”, LU 2008.
Butt Joint
Decreasing lack of penetration along weld
Weld Joint
Mechanical Properties
Blouin et. al. “Detection of Skin Disbond in Honeycombs and Coating Detachment by Laser Tapping Technique”, LU 2008.
Honeycomb delamination and disbond
Fundamentals of Eddy Current
Metallic Specimen
Drive Coil
EddyCurrent
Magnetic Flux Lines
.Metallic Specimen
Drive Coil
EddyCurrent
Magnetic Flux Lines
.
Crack
No Flaw With Flaw
Array Eddy Current Technology
Spot A Spot B
32 Element Array Probe
Scanner
Example - FSW Inspection
FSW
Friction Stir Welded Aluminum Plate (1” thick) 32 Element Flexible Eddy Current Probe (Multi
Frequency)
Scan Direction
Inspection Results
20 kHz 480 kHz
Ultrasonically Induced Thermography
UltrasonicHorn Temperature
MeasuringDevice
(IR or Optical)TestSpecimen
AcousticEnergy
• Fast and Non-Contact Inspection• Easy to Interpret Inspection Results
Ultrasonic Induced Thermography
Through Transmission Measurement Single Side Measurement
Ultrasonic Horn
Temperature Sensor
Example (Resistance Spot Welded Thin Metal Plates)
Good WeldBad Weld
X-ray image showing weld nuggets(2 mm diameter RSW)
0
1
2
3
4
5
0 5000 1 104 1.5 104
Good WeldBad Weld
Cha
nge
in T
empe
ratu
re (o C
)
Time (ms)
Correlation to Pull Strength
Summary
Wide range of inspection applications with matrix phased array technology with accuracy and reliability
Laser based ultrasonics is getting widely used across the board as a fast non-contact inspection tool
Imaging capability of array eddy current can reduce operator dependency with easy to understand inspection results
Non-contact ultrasonically induced thermography technique makes it possible to develop a high speed automated inspection system for weld quality as well as bond quality