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Wednesday, May 8, 2019

NDT and Surface Evaluation of Electrical Steels


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Description
The ultimate objective of this project has been to develop a non destructive and surface evaluation on-line system for the determination of localised power loss in electrical steels.

Three different approaches were made by employing three different methods or measuring systems on steel samples to study sequentially:

(1) the position of a grain boundary from both the front and the exact opposite side at the back of the grain-oriented electrical steel sample,
(2) the position of grain boundaries at the surface of grain-oriented electrical steels through the measurement of the field distribution at the surface of the magnetised steel samples, and
(3) the localised power loss in 3.25% grain-oriented electrical steels.

In the first case, a computer based optical microscope and a 3-Chip colour video camera system was used to establish positions of grain boundaries in order to explain differences in field profiles outside the systematic accuracy of measurements.

Content:-
ABSTRACT
CHAPTER ONE: INTRODUCTION
CHAPTER TWO: BACKGROUND
CHAPTER THREE: CONCEPTS OF POWER LOSS
CHAPTER FOUR: METHODS FOR THE DETECTION OF SURFACE FIELDS ON ELECTRICAL STEELS.
CHAPTER FIVE: INVESTIGATION INTO GRAIN BOUNDARIES OF GRAIN ORIENTED SILICON IRON.
CHAPTER SIX: OBSERVATION OF DOMAIN / GRAIN BOUNDARIES USING MAGNETIC FORCE MICROSCOPY.
CHAPTER SEVEN: DESIGN AND DEVELOPMENT OF POWER LOSS SYSTEM.
CHAPTER EIGHT: RESULTS AND DISCUSSION
CHAPTER NINE: CONCLUSION AND FUTURE WORK

Author Details
"Sam Nyamekye K onadu B. Eng, MSc."




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