Results 271 to 280 of about 200,645 (309)

Usability Testing of Ultra High-Strength Steels

Volume 4: Advanced Manufacturing Processes; Biomedical Engineering; Multiscale Mechanics of Biological Tissues; Sciences, Engineering and Education; Multiphysics; Emerging Technologies for Inspection and Reverse Engineering; Advanced Materials and Tribology, 2012
New ultra high strength (UHS) steels have been developed in order to get advantages in machine design and construction. Following benefits can be obtained for example: - less material usage due to lighter constructions; - better payload and less fuel consumption in vehicle industry; - energy saving in ...
Jouko A. Heikkala, Anu J. Väisänen
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Laser welding of ultra high strength steels

Revue de Métallurgie, 2003
Due to their outstanding properties, high strength steels (HSS) are ever more required by the automotive industry. Indeed, high strength steels make it possible to reduce the overall weight of the vehicles. However, manufacturing of industrial parts may be hindered by the higher hardenability of these steels.
G. Restrepo Garcés, P. Verrier, O. Glaise, S. Boidin   +3 more
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Passive Laser Assisted Bending of Ultra-High Strength Steels

Advanced Materials Research, 2011
Formability of ultra-high strength steels is poor causing problems in bending and stretch forming. The target of this work was to improve the formability of ultra-high strength steel sheets by controlled local laser heat treatments. Three steel grades, a bainitic-martensitic 4 mm DQ960 and two martensitic WR500 with 6 mm and 10 mm thicknesses were ...
Mäntyjärvi Kari, Karjalainen Pentti, Järvenpää Antti   +2 more
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Applicability of the Master Curve Method to Ultra High Strength Steels

Volume 1B: Codes and Standards, 2015
Although Ultra High Strength Steels (UHSS) with nominal strengths up to 1500 MPa have been available on the market for many years, the use of these steels in the civil engineering industry is still rather uncommon. One critical point limiting the use of UHSS steels lies in their rather poorly documented fracture properties in relation to more ...
Wallin, Kim, Pallaspuro, Sakari, Karjalainen-Roikonen, Päivi, Suikkanen, Pasi   +3 more
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Ultra High-Strength Maraging Steel

2013
Maraging steels are high-strength steels combined with good toughness. They are used particularly in aerospace and tooling applications. Maraging refers to the ageing of martensite, a hard microstructure commonly found in steels. Research on the kinetics of precipitate formation and austenite reversion in maraging steels has received great attention ...
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Electrohydraulic trimming of advanced and ultra high strength steels

Journal of Materials Processing Technology, 2014
Abstract Electrohydraulic trimming (EHT) is a novel method of trimming sheet metal panels and is based upon the electro-hydraulic effect: a complex phenomenon related to the discharge of high voltage electrical current through a liquid. In EHT, electrical energy is stored in a bank of capacitors and is converted into kinetic energy within the liquid ...
Sergey F. Golovashchenko, Alan J. Gillard, Alexander V. Mamutov, John F. Bonnen, Zejun Tang   +4 more
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Design of Ultra-High Strength Sheet Steel Beams

SAE Technical Paper Series, 1990
<div class="htmlview paragraph">Cold-rolled sheet steels with yield strengths from 50 to 180 ksi have been used for bumper reinforcement beams. As yield strength increases, thickness can be decreased. However, at reduced sheet thickness, the maximum load capacity of a given beam is influenced by local buckling.
James E. Borchelt, Bala Subbaraman
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Controlling Hydrogen Embrittlement in Ultra-High Strength Steels

CORROSION 2004, 2004
Abstract A Fe-13Co-11Ni-3Cr-1Mo-0.2C steel alloy, processed for ultra-high strength and fracture toughness, exhibits three distinct hydrogen trap states in a complex precipitation hardened martensitic microstructure and is susceptible to severe hydrogen embrittlement (HE) at threshold stress intensity levels as low as 20 MPa√m.
John R. Scully, Hakan Dogan, Daoming Li, Richard P. Gangloff   +3 more
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Microstructural Characterizations of Ultra-High Strength Steel Bars

Advanced Materials Research, 2010
Steel bars used in high-rising building were developed by the addition of V and Nb in medium carbon steels. In this study, two steel bars with different diameters (16 mm and 36 mm) were analyzed via optical and transmission electron microscopy (OM and TEM)., the microstructures of the steels studuied consist of ferrite and pearlite the same as those of
Meng Yang Chen, Bo Ming Hwuang, Jer Ren Yang   +2 more
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Ultra-High-Strength and Gigapascal Steels

Abstract This chapter discusses ultra-high-strength steels (UHSS) and gigapascal (GPa) steels and discusses the global formability diagram.
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