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amorphous metals
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Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003836
EISBN: 978-1-62708-183-2
...Abstract Abstract This article illustrates the three techniques for producing glassy metals, namely, liquid phase quenching, atomic or molecular deposition, and external action technique. Devitrification of an amorphous alloy can proceed by several routes, including primary crystallization...
Abstract
This article illustrates the three techniques for producing glassy metals, namely, liquid phase quenching, atomic or molecular deposition, and external action technique. Devitrification of an amorphous alloy can proceed by several routes, including primary crystallization, eutectoid crystallization, and polymorphous crystallization. The article demonstrates a free-energy versus composition diagram that summarizes many of the devitrification routes. It provides a historical review of the corrosion behavior of fully amorphous and partially devitrified metallic glasses. The article describes the general corrosion behavior and localized corrosion behavior of transition metal-metal binary alloys, transition metal-metalloid alloys, and amorphous simple metal-transition metal-rare earth metal alloys. It concludes with a discussion on the environmentally induced fracture of glassy alloys, including hydrogen embrittlement and stress-corrosion cracking.
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001095
EISBN: 978-1-62708-162-7
...Abstract Abstract Metallic glasses can be prepared by solidification of liquid alloys at cooling rates sufficient to suppress the nucleation and growth of competing crystalline phases. This article presents a historical survey of the study of metallic glasses and other amorphous metals...
Abstract
Metallic glasses can be prepared by solidification of liquid alloys at cooling rates sufficient to suppress the nucleation and growth of competing crystalline phases. This article presents a historical survey of the study of metallic glasses and other amorphous metals and alloys. This includes a discussion of synthesis and processing methods, structure and morphology, and a description of the electronic, magnetic, thermodynamic, chemical, and mechanical properties of metallic glasses. In addition, the article describes the development of metallic glasses as materials for technical applications.
Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003153
EISBN: 978-1-62708-199-3
... include high-purity iron, low-carbon irons, silicon (electrical) steels, nickel-iron alloys, iron-cobalt alloys, ferritic stainless steels, amorphous metals, and ferrites (ceramics). Finally, the article provides a short note on alloys for magnetic temperature compensation. amorphous metals...
Abstract
This article discusses the ferromagnetic properties of soft magnetic materials, explaining the effects of impurities, alloying elements, heat treatment, grain size, and grain orientation on soft magnetic materials. It describes the types of soft magnetic materials, which include high-purity iron, low-carbon irons, silicon (electrical) steels, nickel-iron alloys, iron-cobalt alloys, ferritic stainless steels, amorphous metals, and ferrites (ceramics). Finally, the article provides a short note on alloys for magnetic temperature compensation.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001450
EISBN: 978-1-62708-173-3
... of such alloys into ductile, thin, amorphous alloy foil forms when rapid solidification (RS) technology is used. In many cases, a foil filler metal produced by the RS process is very well suited for use in brazing applications. The advantageous utilization of microcrystalline/amorphous RS soldering or brazing...
Book: Corrosion: Materials
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003814
EISBN: 978-1-62708-183-2
... easily be categorized by elemental base. These include electroplated hard chromium, thermal spray coatings, clad metals, powder metallurgy materials, amorphous metals, intermetallics, cemented carbides, metal-matrix composites, and joints. Copper The most widely used nonferrous materials are those...
Abstract
Nonferrous metals and alloys are widely used to resist corrosion. This article describes the corrosion behavior of the most widely used nonferrous metals, such as aluminum, copper, nickel, and titanium. It also provides information on several specialty nonferrous products that cannot easily be categorized by elemental base.
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001468
EISBN: 978-1-62708-173-3
...Abstract Abstract This article discusses the material combinations, design details, and fabrication processes considered in the adhesive bonding or melt-fuse interface (amorphous bond) bonding method of joining resin-matrix composites to metals. adhesive bonding bolted joints bonded...
Image
Published: 01 January 1993
Fig. 11 Microstructure of brazed joint of CP titanium with copper made using TiBraze590 amorphous foil as a filler metal. Original magnification: 100×
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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003589
EISBN: 978-1-62708-182-5
... temperature, the volume diffusion predominates in both metals and oxides. Oxide Texture Amorphous Oxides In the very early stages of oxidation and especially at low and intermediate temperatures ( T < T T ), some oxides appear to grow with an amorphous structure. In general, the oxides...
Abstract
This article describes the Schottky defect and the Frenkel defect in oxides. It provides information on the p-type metal-deficit oxides and n-type semiconductor oxides. The article discusses diffusion mechanisms and laws of diffusion proposed by Fick. It explains the oxide texture of amorphous and epitaxy oxide layers and presents equations for various oxidation reaction rates. The article reviews different theories to describe the oxidation mechanism. These include the Cabrera-Mott, Hauffe-IIschner, Grimley-Trapnell, Uhlig, and Wagner theories.
Image
Published: 01 January 1993
Fig. 15 Microstructure of brazed joint of Ti-6Al-4V alloy with stainless steel 304 made using TiBraze200 amorphous foil as a filler metal. Original magnification: 100×
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Image
Published: 01 January 1993
Fig. 21 Microstructure of alumina-to-titanium grade 2 joint brazed at 920 °C (1690 °F) in vacuum using BTi-5 amorphous foil as a filler metal. Original magnification: 100×
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Image
Published: 01 January 1993
Fig. 23 Microstructure of graphite-to-Ti-6Al-4V alloy joint brazed at 920 °C (1690 °F) in vacuum using TiBraze590 amorphous foil as a filler metal. Original magnification: 200×
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Image
Published: 01 January 1993
Fig. 20 Microstructure of boron nitride-Ti-6Al-4V alloy joint brazed in vacuum at 920 °C (1690 °F) using BTi-5 amorphous foil as a filler metal. Original magnification: 200×
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Image
Published: 01 January 1993
Fig. 9 Microstructure and propagation of cracks (white shadowed) in Ti-6Al-4V alloy brazed joint made using TiBraze590 amorphous foil as a filler metal. The joint was loaded to ~95% of shear strength. Original magnification: 370×
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Image
Published: 01 December 2009
Fig. 1 Schematic representations of (a) the fully annealed state of a polycrystalline metal, (b) the former interpretation of a cold-worked specimen (amorphous state), (c) the modern interpretation of the latter, (d) a hot-worked dynamically recrystallized microstructure, and (e
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Image
Published: 01 January 1993
Fig. 1 Microstructure of commercially pure (CP) titanium joint brazed in vacuum at 890 °C (1630 °F) for 10 min using a standard filler metal BTi-5 in the form of amorphous foil 50 μm thick. Original magnification: 200×
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Image
Published: 01 January 1993
Fig. 7 (a) Microstructure of brazed joint of Ti-6Al-4V alloy (titanium grade 5) made using BTi-5 amorphous foil as a filler metal. Original magnification: 500×. (b) Macrostructure with crack propagation in this brazed joint. Original magnification: 100×
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Image
Published: 01 January 1993
Fig. 2 Microstructure of CP titanium joint brazed in vacuum at 830 °C (1530 °F) for 10 min using the filler metal TiBraze800 (Zr-14.6Ti-12.6Ni-7Cu-1Hf wt%) in the form of amorphous foil 50 μm thick. Original magnification: 200×
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Image
Published: 01 January 1993
Fig. 17 Alumina ceramic bar brazed at 920 °C (1690 °F) to CP titanium in vacuum using BTi-5 amorphous foil as a filler metal. Alumina ceramic bars 15 × 6 × 6 mm (0.59 × 0.24 × 0.24 in.); titanium bars 60 × 12.5 × 3.2 mm (2.36 × 0.49 × 0.13 in.)
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Image
Published: 01 January 1993
Fig. 35 A sample of titanium honeycomb panel (100 × 100 × 6 mm, or 3.94 × 3.94 × 0.24 in.) brazed using BTi-5 filler metal in the form of amorphous foil 50 μm thick. Plate CP titanium, honeycomb core Ti-3Al-2.5V foil. Brazing temperature 890 °C (1630 °F)
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Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0009239
EISBN: 978-1-62708-173-3
... and 1000 °F) in a salt media exhibited only slight degradation of the mechanical properties of the joints but no visible corrosion attack of the filler metal or the brazed joints ( Ref 13 ). Amorphous foils of BTi-5, TiBraze590, and TiBraze800 ( Table 7 ) exposed for 1000 h in 5% salt fog according to ASTM...
Abstract
This article discusses the effects of brazing temperature and thermal treatment on structure and mechanical behavior of different classes of titanium base metals such as commercially pure (CP) titanium, alpha or near-alpha alloys, alpha-beta alloys, and beta alloys. The classification, properties, and potential heat treatment of titanium base alloys are presented in tables. The article provides information on brazed joints of titanium with carbon steels, as well as ceramics and graphite. It discusses the risks involved in titanium brazing, including erosion of base metal, brittle intermetallics, and low ductility. The article reviews induction and torch brazing, infrared brazing, diffusion brazing, and brazing by heating with ion bombardment. It concludes by describing the design criteria and limitations of brazing.