Influence of cross-screw rolling modes on mechanical  properties and fracture toughness of pipe steel

Cermets are designed to optimize the mechanical properties of ceramics (hard and strong component) and metals (ductile and tough component) into one system. However, the processing of such systems is a problem in obtaining fully dense composite without deleterious reaction products. In the lightweight (2.65 g/cc) B4C-Al cermet, many of the processing problems have been circumvented. It is now possible to process fully dense B4C-Al cermet with tailored microstructures and achieve unique combination of mechanical properties (fracture strength of over 600 MPa and fracture toughness of 12 MPa-m1/2). In this paper, microstructure and fractography of B4C-Al cermets, tested under dynamic and static loading conditions, are described.The cermet is prepared by infiltration of Al at 1150°C into partially sintered B4C compact under vacuum to full density. Fracture surface replicas were prepared by using cellulose acetate and thin-film carbon deposition. Samples were observed with a Philips 3000 at 100 kV.

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Characterization of interfaces in CVD-coated nicalon fiber-reinforced SiC

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100154755 ◽

1989 ◽

Vol 47 ◽

pp. 556-557

Author(s):

K.L. More ◽

R.A. Lowden

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Chemical Vapor ◽

Chemical Vapor Infiltration ◽

Frictional Stress ◽

Fiber Reinforced ◽

Pull Out ◽

Carbon Coated ◽

Fiber Matrix

The mechanical properties of fiber-reinforced composites are directly related to the nature of the fiber-matrix bond. Fracture toughness is improved when debonding, crack deflection, and fiber pull-out occur which in turn depend on a weak interfacial bond. The interfacial characteristics of fiber-reinforced ceramics can be altered by applying thin coatings to the fibers prior to composite fabrication. In a previous study, Lowden and co-workers coated Nicalon fibers (Nippon Carbon Company) with silicon and carbon prior to chemical vapor infiltration with SiC and determined the influence of interfacial frictional stress on fracture phenomena. They found that the silicon-coated Nicalon fiber-reinforced SiC had low flexure strengths and brittle fracture whereas the composites containing carbon coated fibers exhibited improved strength and fracture toughness. In this study, coatings of boron or BN were applied to Nicalon fibers via chemical vapor deposition (CVD) and the fibers were subsequently incorporated in a SiC matrix. The fiber-matrix interfaces were characterized using transmission and scanning electron microscopy (TEM and SEM). Mechanical properties were determined and compared to those obtained for uncoated Nicalon fiber-reinforced SiC.

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CARLSON ALLOY C600 and C600 ESR

Alloy Digest ◽

10.31399/asm.ad.ni0470 ◽

1994 ◽

Vol 43 (11) ◽

Keyword(s):

Mechanical Properties ◽

Solid Solution ◽

Fracture Toughness ◽

Cold Working ◽

Elevated Temperatures ◽

High Strength ◽

Heat Treating ◽

Solid Solution Alloy ◽

Resistance To Oxidation ◽

Good Workability

Abstract CARLSON ALLOYS C600 AND C600 ESR have excellent mechanical properties from sub-zero to elevated temperatures with excellent resistance to oxidation at high temperatures. It is a solid-solution alloy that can be hardened only by cold working. High strength at temperature is combined with good workability. 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: Ni-470. Producer or source: G.O. Carlson Inc.

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SUPERSTON 40

Alloy Digest ◽

10.31399/asm.ad.cu0150 ◽

1965 ◽

Vol 14 (4) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Corrosion Resistance ◽

Shear Strength ◽

Physical Properties ◽

Tensile Properties ◽

Heat Treating ◽

Aluminum Bronze

Abstract SUPERSTON 40 is an aluminum bronze containing 12% manganese and has good casting properties and excellent mechanical properties. It is recommended for any application where extreme corrosion resistance is required and where weldability is desired, such as propellers and marine equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness, creep, and fatigue. It also includes information on corrosion resistance as well as casting, forming, heat treating, and machining. Filing Code: Cu-150. Producer or source: H. Kramer & Company.

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KAISER ALUMINUM ALLOY 7050

Alloy Digest ◽

10.31399/asm.ad.al0366 ◽

2000 ◽

Vol 49 (1) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Tensile Strength ◽

Aluminum Alloy ◽

Heat Treating ◽

High Fracture Toughness ◽

High Fracture ◽

Kaiser Aluminum ◽

Structural Parts ◽

Very High

Abstract Kaiser Aluminum Alloy 7050 has very high mechanical properties including tensile strength, high fracture toughness, and a high resistance to exfoliation and stress-corrosion cracking. The alloy is typically used in aircraft structural parts. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: AL-366. Producer or source: Tennalum, A Division of Kaiser Aluminum.

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VIRGO 17.4 PH

Alloy Digest ◽

10.31399/asm.ad.ss1145 ◽

2013 ◽

Vol 62 (5) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Corrosion Resistance ◽

Physical Properties ◽

Tensile Properties ◽

Precipitation Hardening ◽

Heat Treating

Abstract Virgo 17.4 PH is a 17Cr-4Ni-3Cu-0.3% Cb alloy that is precipitation hardening. It is martensitic and combines high mechanical properties with corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-1145. Producer or source: Industeel USA, LLC.

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AL TECH POTOMAC A

Alloy Digest ◽

10.31399/asm.ad.ts0478 ◽

1987 ◽

Vol 36 (7) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

High Temperature ◽

Tensile Ductility ◽

Heat Treating ◽

Fatigue Properties ◽

Die Steel ◽

Transverse Tensile ◽

Temperature Performance ◽

Specialty Steel

Abstract AL TECH POTOMAC A has well-balanced strength and toughness which make it especially suitable for a wide variety of hot-die steel applications, including those involving severe coolants. Its outstanding mechanical properties make it useful for many non-tooling requirements such as aerospace components. For more specialized needs, the manufacturer offers special melting processes that enhance this steel's fatigue properties and transverse tensile ductility. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, and machining. Filing Code: TS-478. Producer or source: AL Tech Specialty Steel Corporation.

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CF8C-PLUS

Alloy Digest ◽

10.31399/asm.ad.ss1006 ◽

2008 ◽

Vol 57 (1) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Tensile Properties ◽

High Temperatures

Abstract CF8C-Plus is an austenitic casting grade similar to CF8C, but with improved chemistry to stay fully austenitic at high temperatures and thus retain good mechanical properties. This datasheet provides information on composition, microstructureand tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on casting and joining. Filing Code: SS-1006. Producer or source: Caterpillar Technical Center.

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FERRIUM S53

Alloy Digest ◽

10.31399/asm.ad.sa0589 ◽

2008 ◽

Vol 57 (12) ◽

Keyword(s):

Mechanical Properties ◽

Fracture Toughness ◽

Corrosion Resistance ◽

Heat Treating ◽

Corrosion Resistant Steel ◽

Resistant Steel ◽

Corrosion Resistant ◽

Aircraft Landing ◽

Aircraft Landing Gear ◽

Better Than

Abstract Ferrium S53 was developed for use as a structural corrosion resistant steel for aircraft landing gear. S53 has a corrosion resistance equivalent to 440C, strength equivalent to or better than 300M (AMS 6257A) and SAE 4340 (see Mechanical Properties), optimum microstructure features for maximum fatigue resistance, and a surface hardenability equal to or greater than 67 HRC for wear and fatigue. This datasheet is an update to Alloy Digest SS-942 and SS-1003. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: SA-589. Producer or source: QuesTek Innovations, LLC.

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