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Chapter 1c - Continuation Introduction of Non Destructive Testing - Coggle…
Chapter 1c - Continuation Introduction of Non Destructive Testing
NDT
OBJECTIVES
Design stipulated standards (e.g. dimension, strength and stiffness) do not deviate beyond permissible limits and immediate action is initiated in case of such deviations
To establish reproducibility of the fabrication process for successive batches of production with minimum rejection and repair
To establish reliability of NDT methods so that potentially harmful defects, damages, material inhomogeneities or dimensions are noticed while minor defects or deviations do not lead to unnecessary rejection or repair
The Science & Technology
of NDE involves:
Device that interacts with the test object which generates the information
Knowledge of materials & fabrication process
To understanding the mechanism of the interaction between the information which generate the device and also the test object itself
Educate tools which is hardware & software to capture & record the results of the interaction
To analyze generated information and its correlation
Presentation of the results
Evaluation of the test object (discussion)
To make a decision (accept, repair or reject)
Communication
Factors Influencing
the reliability of NDE
Human factor
Testing factor
Test object
Nature of Defect or Discontinuity
Knowledge Based & Facilities
Risk Factors
NDT for Life Cycle Management
Estimation of variation in material homogeneity, dimensions due to corrosion, erosion, irradiation, damage due to fatigue and lightning strike
Generates defect-property correlation data and specific information related to life extension of the components
Preparation of specifications/documentation/test techniques for periodic NDT inspection for health monitoring and to determine the stage of damage in a structure
Interaction between Design
Officers and NDT Officers
Structure & assembly inspectability using NDT methods
To ensure the damage tolerance concept of design
Incorporating the statistical approach in developing acceptance criteria for design stipulated properties