Boron Suboxide and Boron Subphosphide Crystals: Hard Ceramics That Shear without Brittle Failure

2015 ◽  
Vol 27 (8) ◽  
pp. 2855-2860 ◽  
Author(s):  
Qi An ◽  
William A. Goddard
Keyword(s):  
Brittle Failure ◽  
Boron Suboxide ◽  
Boron Subphosphide

ALLOY STEEL 3.5Ni-1.8Cr-0.4Mo-0.1V

Alloy Digest ◽  
1984 ◽  
Vol 33 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Alloy Steel ◽  
Brittle Failure ◽  
Water Immersion ◽  
Heat Treating ◽  
Water Spray ◽  
Heavy Duty ◽  
High Hardenability ◽  
Steel Mills

Abstract Alloy Steel 3.5Ni-1.8Cr-0.4Mo-0.1V is highly suitable for massive components, usually more than four inches thick. It has high hardenability which in a water-spray or water-immersion quench contributes to the formation of sizeable amounts of martensite along with some bainite, and possibly a little ferrite. On tempering, the martensite adds to toughness and lowers the temperature of transition from tough to brittle failure. This steel is suitable for intermediate-duty and heavy-duty generator and turbine rotors, large axles and shafts, large gears and ship forgings. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SA-404. Producer or source: Alloy steel mills and foundries.

Lamellar Tearing Observations Regarding the Application of European Standards in the Field of Welded Steel Constructions

2018 ◽  
Vol 69 (6) ◽  
pp. 1352-1354
Author(s):  
Anamaria Feier ◽  
Oana Roxana Chivu
Keyword(s):  
Bearing Capacity ◽  
Brittle Failure ◽  
Engineering Practice ◽  
Steel Bridge ◽  
Railway Bridge ◽  
Welded Steel ◽  
Direct Replacement ◽  
Lamellar Tearing ◽  
European Standards ◽  
Comprehensive Study

The problem of corrosion for old steel bridges in operation is often solved by direct replacement of elements or structure. Only a few studies have been done to determine the efforts influenced by corrosion in those elements. In general, it is considered that a corroded element has exceeded the bearing capacity and should be replaced, but if the corroded element is secondary it could be treated and kept. A factor in the rehabilitation of an old steel bridge in operation is the aspect of structure. If the structure is corroded, rehabilitation decision is taken is easier. Lamellar tearing describes the cracking that occurs beneath the weld and can be characterized as a brittle failure of steel, in the direction perpendicular to the plane of rolling. The paper presents a comprehensive study on lamellar tearing and summarizes some conclusions about the prevention of them. The conclusions will be exemplified in the case of a railway bridge, with a main truss girder. The paper presents also some observations regarding the stress analysis in fillet welds, resulting from the engineering practice.

Root Cause Analysis of an Unexpected Brittle Failure in a Carbon Steel Slab

2020 ◽  
pp. 105205
Author(s):  
Ali Keramatian ◽  
Abbas Bahrami ◽  
Amir Hossein Darougheh ◽  
Shahin Zare
Keyword(s):  
Carbon Steel ◽  
Brittle Failure ◽  
Root Cause Analysis ◽  
Cause Analysis ◽  
Root Cause ◽  
Steel Slab

scholarly journals Experimental and theoretical characterization of mixed mode brittle failure from square holes

2021 ◽  
Vol 228 (1) ◽  
pp. 33-43
Author(s):  
Aurélien Doitrand ◽  
Pietro Cornetti ◽  
Alberto Sapora ◽  
Rafael Estevez
Keyword(s):  
Brittle Failure ◽  
Mixed Mode ◽  
Theoretical Characterization

Resistance of lap welded joints to ductile and brittle failure in bending

1993 ◽  
Vol 7 (10) ◽  
pp. 809-811
Author(s):  
I A Daminov ◽  
K M Gumerov ◽  
A G Siraev ◽  
R S Zainullin
Keyword(s):  
Welded Joints ◽  
Brittle Failure

A new route for the synthesis of boron suboxide B7O

1995 ◽  
Vol 223 (1) ◽  
pp. L7-L9 ◽  
Author(s):  
Xiaoyang Liu ◽  
Xudong Zhao ◽  
Weimin Hou ◽  
Wenhui Su
Keyword(s):  
Boron Suboxide

Hard and Soft: Principles of Polyner-Impregnated Concrete Using Elastomers

2013 ◽  
Vol 687 ◽  
pp. 118-123 ◽  
Author(s):  
Oliver Weichold ◽  
Udo Antons
Keyword(s):  
Plastic Deformation ◽  
Fracture Mechanics ◽  
Brittle Failure ◽  
Elastic Moduli ◽  
Domain Size ◽  
Glassy Polymers ◽  
Crack Deflection ◽  
Micro Cracks ◽  
Concrete Interface ◽  
Crystalline Matrix

The effect of incorporating elastomeric domains in concrete is described from the point of fracture mechanics. Concrete is subject to brittle failure, since cracks propagate at an enormous speed in the crystalline matrix. However, micro cracks are attracted to volume elements with lower elastic moduli such as elastomeric domains. Cracks that encounter the concrete-elastomer interface are stopped since energy is dissipated by plastic deformation of and/or crack deflection by the elastomer. The domain size and the distribution of the elastomer as well as, and properties of the elastomer-concrete interface are crucial parameters. Such a combination differs substantially from previously prepared polymer-impregnated concretes, in which only glassy polymers were used.

Description of brittle failure of non-uniform MEMS geometries

2007 ◽  
Vol 515 (6) ◽  
pp. 3267-3276 ◽  
Author(s):  
A. McCarty ◽  
I. Chasiotis
Keyword(s):  
Brittle Failure
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