Fatigue, Fracture, and Damage Tolerance of Ultrahigh-Strength Martensitic Tendon-Rods for Structural Engineering
Source abstract
Abstract
The paper addresses the fatigue resistance, fracture behavior, and damage tolerance of a new type of ultrahigh-strength bar for prestressing concrete made of a low-alloy lath martensitic steel. The fracture tests show that the bar steel has a medium-high fracture toughness of 75 MPa m1/2 and a fatigue cracking resistance that fits the Paris-Erdogan Law as most of Eurocode 3 structural steels. The damage tolerance analysis combines two failure assessment diagrams (FADs), the first focused on the damage level and the second on toughness and yielding capacity as material properties of the bar steel, whose influence and interaction are determinant for failure. The location of the experimental failure data in the FADs indicates that the steel is endowed with a combination of strength, ductility, and toughness able to prevent unexpected failures. The damage micro-mechanisms revealed from the examination of broken specimens differ from fatigue to fracture cracking, but in a manner consistent with the observed mechanical behavior and microstructure of the bar steel.
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Research context
OpenAlex topics: Microstructure and Mechanical Properties of Steels · Fatigue and fracture mechanics · Hydrogen embrittlement and corrosion behaviors in metals
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Material Science Department, ETSI Caminos, Polytechnic University of Madrid, 5 Prof. Aranguren St., 28040 Madrid, Spain
Applied Physics and Materials Engineering Department, ETSI Industriales, Polytechnic University of Madrid, 2 José Gutiérrez Abascal St., 28006 Madrid, Spain
Manufacturing Engineering Department, Faculty of Engineering, “Dunarea de Jos” University of Galati, 80008 Galati, Romania
Funding
MCIN/AEI/10.13039/501100011033 and the “ERDF A Way of Making Europe” · MCIN/AEI/10.13039/501100011033 and the “ESF Investing in Your Future”
References (29)
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