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amorphous metals

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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001391
EISBN: 978-1-62708-215-0
... ink. Small, dark-appearing amorphous areas dotted the interface between the thick-film ink and the cermet metallization. The termination appeared to have been plated with two distinct metallic layers ( Fig. 7 ). Fig. 7 Chip cross section from group l, those samples taken in the as-received...
Image
Published: 01 December 1993
Fig. 8 An interesting detail on the group 1 resistors was the presence of an amorphous dark-appearing phase dotting the interface between the cermet metallization and the thick-film polymer conductive ink. Fourier transform infrared analysis determined that this dark-appearing phase More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
..., will contract to a much greater extent than the metal insert. This difference in thermal expansion causes a high level of interference hoop stress on the plastic material at the interface. Such stresses are exerted on the part as soon as it cools from the molding process. Additionally, amorphous resins...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006932
EISBN: 978-1-62708-395-9
... on properties of plastics. It explains the use of high-modulus graphite fibers in amorphous polymers. high-modulus graphite fibers plastics thermal diffusivity thermal expansion thermal stress ENGINEERING PLASTICS, as a general class of materials, are prone to the development of internal stresses...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006922
EISBN: 978-1-62708-395-9
... Chemical resistance Thermal properties Assembly options Many of these benefits come with important considerations. For example, plastics are excellent thermal insulators, but they can expand and contract 5 to 10 times more than metals over the same temperature change. Ignoring this property can...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006944
EISBN: 978-1-62708-395-9
... Abstract The discussion on the fracture of solid materials, both metals and polymers, customarily begins with a presentation of the stress-strain behavior and of how various conditions such as temperature and strain-rate affect the mechanisms of deformation and fracture. This article describes...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006917
EISBN: 978-1-62708-395-9
... and market sectors. Some examples of plastic parts commonly seen in day-to-day failure analysis investigations that fail from ESC include: Housings and enclosures for medical devices Assemblies joined with metal screws Poly(acrylonitrile-butadiene-styrene), polyvinyl chloride, and chlorinated...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006934
EISBN: 978-1-62708-395-9
... superposition principle (TSSP) time-temperature superposition principle (TTSP) yielding CREEP, STRESS RELAXATION, and the effect of strain rate on yielding are related phenomena that are generally much more significant to polymers at room temperature than they are to metals. Two additional influences...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
... there are a greater number of chain ends per unit volume for short-chain species. Another important consequence of high molecular weight is its effect on crystallinity. In contrast to the typical crystalline structures of low-molecular-weight materials (such as metals), most polymers are amorphous (noncrystalline...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006918
EISBN: 978-1-62708-395-9
... Abstract This article reviews generalized test methodologies for fatigue characterization of polymers and examines fatigue fracture mechanisms in different engineering plastics. It provides detailed micromechanistic images of crack-tip processes for a variety of semicrystalline and amorphous...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001655
EISBN: 978-1-62708-220-4
... of sigma phase. Fig. 3 Appearance of pits adjacent to welds in the AISI 304L stainless steel tank (etched with oxalic acid solution, 3.5×). The carbon content of the parent metal and the weld metal was found to conform to the applicable specifications. At this point in the investigation...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006933
EISBN: 978-1-62708-395-9
.... The investigation is performed in generally the same manner, whether the failed component was produced from metal or plastic or a combination of these materials. Thus, the same typical steps are required to conduct a comprehensive failure investigation, and these are outlined in Fig. 1 . Conceptually, the failure...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... viscoelasticity Engineering and Commodity Plastics In contrast to commodity plastics such as polyethylene and polystyrene that are familiar in inexpensive and disposable consumer goods, engineering plastics are used in smaller amounts and may replace metal parts in electronics, plumbing, automotive...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001364
EISBN: 978-1-62708-215-0
... of a centrifugal refrigeration machine using R-12 refrigerant. The unit has a capacity of 319 Mg (320 tons) and was installed in 1978. The impellers are manufactured from an aluminum alloy. Selection of Specimens The samples selected for analysis included metallic fragments and primarily black deposits...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003525
EISBN: 978-1-62708-180-1
... the same manner, whether the failed component was produced from metal or plastic or a combination of these materials. Thus, the general steps required to conduct a comprehensive failure investigation are the same, and these are outlined in Fig. 1 . In general, the failure analysis process is analogous...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006941
EISBN: 978-1-62708-395-9
... to satisfy plastics design requirements. The information obtained thereby reveals the fluid-like character of solid plastic materials. Unlike metals and ceramics, which typically exhibit solid elastic material responses for the significant majority of the temperature range up to melt temperature, plastics...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
...); fretting cycles, 10 5 . Sample was nital etched and viewed with scanning electron microscopy (SEM). One development has been die, rapid quenching of liquid metals to produce amorphous metals. Fretting of two of these materials, Co-4Fe-2Mo-16Si-12B and Fe-4Si-15B, indicates that they are not wear...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003541
EISBN: 978-1-62708-180-1
... Abstract This article reviews the mechanical behavior and fracture characteristics that discriminate structural polymers from metals. It provides information on deformation, fracture, and crack propagation as well as the fractography involving the examination and interpretation of fracture...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006865
EISBN: 978-1-62708-395-9
... Abstract This article reviews the mechanical behavior and fracture characteristics that discriminate structural polymers from metals, including plastic deformation. It provides overviews of crack propagation and fractography. The article presents the distinction between ductile and brittle...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006940
EISBN: 978-1-62708-395-9
... the first to provide fatigue of polymers using this technique. Strain-controlled tests are often employed in fatigue of metals ( Ref 8 , 9 ) to produce a strain-life curve and, most importantly, a cyclic stress-strain curve to describe the response of these materials to variable strain amplitude...