SQUIDS: Nondestructive Testing

Bousack, Herbert; Hohmann, R.; Krause, H.; Panaitov, G.; Zhang, Y.

doi:10.1016/b978-0-12-803581-8.01910-x

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2017

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“…Fine grained steel qualities meet these requirements, for example. However, austenitic weld materials are highly anisotropic due to their dendritic structure produced by the cool down process during welding [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Phased Array Ultrasonic Testing of Thin DP Steel Electron Beam Weld Joints

Šimeková

Hodúlová

Kovaříková

2017

MSF

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Duplex steels are an important group of materials which are generally used for applications where resistance to corrosion, or high strength and creep resistance at elevated temperatures, are required. They are used extensively in nuclear plant. Although ultrasonic inspection methods have been routinely used in industry for some three decades, it is well known that cast or welded austenitic components can be difficult, or even impossible, to examine ultrasonically. Development of ultrasonic techniques is therefore in progress in several countries to provide improvements which are being sought on safety and economic grounds.The aim of this paper is a brief description of the relevant metallurgical characteristics given before a consideration of the physical properties of the weld metal and the current theoretical models used to describe ultrasound propagation in it. The paper deals with the steps taken to improve the capabilities of ultrasonic inspection and includes a discussion of the problems of flaw location and sizing.

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Section: Introductionmentioning

confidence: 99%