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What is HEYN

Chapter 4
Advanced Models and Tools for Effective Decision Making Under Uncertainty and Risk Contexts
It is a method to measure the grain size in the heat affected zone of steel after welding, observed by microscope, grain size in accordance with the ASTM (112-63) standard.
Published in Chapter:
Fatigue Fracture, CTOD, and CVN Testing in Heat-Affected Zone of High Strength Low Alloy Steels
Manuel Viseras Pico (University of Cadiz, Spain), Rafael González-Palma (University of Cádiz, Spain), María Carmen Carnero (University of Castilla-La Mancha, Spain & University of Lisbon, Portugal), Carlos López-Escobar (Arconic, Spain), and David Almorza (University of Cadiz, Spain)
Copyright: © 2021 |Pages: 67
DOI: 10.4018/978-1-7998-3246-1.ch004
Abstract
High strength low alloy steels (HSLA) are currently used in large quantities for constructions in the North Sea and elsewhere. For success operation under such rigorous conditions, it is essential to ensure adequate weld metal toughness at temperatures of -10ºC or even lower is used. To comply with this high requirement, the heat input control is needed to avoid forming martensitic microstructure in high strength low alloy steels (HAZ) near to the fusion line during weldment cooling. This work carried out CTOD tests to ensure that, under welding conditions, the fatigue crack, toughness, hardness, and resilience in the HAZ are acceptable with the standards. Crack size in accordance with number cycles will be represented as the crack growth rate da/dN vs. stress intensity factor amplitude.
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