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hexagonal metals

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001432
EISBN: 978-1-62708-221-1
... or depressions disposed in an annular manner. When sectioned, the nuts showed a surprising method of construction. The nuts for the bolts had been made by using conventional pipe couplings inserted into sleeves made from hexagonal bar and the coupling secured to the sleeve by welding at each outer face. The ends...
Image
Published: 01 January 2002
Fig. 22 Effect of temperature on toughness and ductility of face-centered cubic (fcc), body-centered cubic (bcc), and hexagonal close-packed (hcp) metals More
Image
Published: 01 December 1993
Fig. 4 Magnified angular view at opened end of steel fitting shown in Fig. 2 . Note torn metal, bum marks, and incipient melting at base. Hexagonal rim did not flare out. 2.5× More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
... due to stress corrosion. For hexagonal close-packed metals, the dislocation structure and cyclic behavior are more sensitive to crystal orientation than are cubic metals because their anisotropic properties produce diverse microfractographic features. [ 35 – 37 ] Fig. 3 Scanning electron...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001749
EISBN: 978-1-62708-215-0
... that was generated. The loss of shrapnel-type bits of steel from the lip of the fitting occurred as the head was ejected. Fig. 4 Magnified angular view at opened end of steel fitting shown in Fig. 2 . Note torn metal, bum marks, and incipient melting at base. Hexagonal rim did not flare out. 2.5...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... particles could be discerned on the conchoidal fracture planes with the SEM. The precipitates proved to be thin and partially transparent platelets of a hexagonal crystal lattice whose parameters resemble those of AIN. The precipitates were at least in part still undissolved in spite of the long holding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001641
EISBN: 978-1-62708-235-8
... water, which prefer a hexagonal crystal habit. Entrained air is another type of gas porosity, but it is generally less well known. Entrained air porosity occurs during the molten metal injection process and is due to excessive turbulence. Entrained air porosity tends to be irregular in shape...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001437
EISBN: 978-1-62708-220-4
...Abstract Abstract A steam jacketed autoclave of orthodox design was fabricated from mild steel for a working pressure of 320 psi. The only unusual feature in its construction was a protective layer of weld metal, which was deposited on the internal surface of the upper half of the 1 in. thick...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001681
EISBN: 978-1-62708-234-1
... of the nozzle, a configuration was used which required two castings. In the top part, where temperatures are high, a cast Co-Cr-Fe alloy was used. In the lower portion, where the temperature is lower, Inconel 600 was used. These two castings were joined by welding, using Stellite 188 as a filler metal. Also...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
... cubic crystal structures and is frequently transgranular in hexagonal close-packed metals. Changes in the alloy composition of either the structural or the embrittling metal can have a strong influence on the embrittlement severity and extent. For LMIE, subcritical crack growth rate is extremely...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001570
EISBN: 978-1-62708-220-4
... Thermal fatigue fracture Crevice corrosion In recent years, there has been a growing application of reactive metals in the processing equipment in chemical, petroleum, and power industries. Commercially pure titanium with desirable engineering properties as well as excellent corrosion resistance...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001784
EISBN: 978-1-62708-241-9
... at the thinnest grip wall section of the flat surface inside socket drum as shown in Figs. 1a , b and 2 . Geometry of the hexagonal grip may help a better screw grip, but it adds regions with high stress concentration that are vulnerable to failure [ 1 ]. Fig. 1 ( a , b ) Fractured wrench socket...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
.... The fracture path is usually intergranular in polycrystalline metals having cubic crystal structures and is frequently transgranular in hexagonal close-packed metals. Changes in the alloy composition of either the structural or the embrittling metal have a strong influence on the embrittlement severity...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001099
EISBN: 978-1-62708-214-3
... and treated compatible coatings to avoid corrosion and hydrogen evolution at the dissimilar metal junctions. Applications Commercial refrigeration equipment cools a system below the temperature of its surroundings using a closed-circuit vapor-compression thermodynamic cycle, wherein the cooling...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001785
EISBN: 978-1-62708-241-9
... for testing, all of which exceeded the minimum torque requirement as defined by the standard. None of the wrench jaws failed during the testing; however, the jaws “opened” or yielded when forced over the hardened hexagonal spindle of the test fixture, with forces exceeding 1,650-inch pounds (186 N m...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... atoms typically result in a crystalline structure, which in most engineering metals are face-centered cubic (fcc), body centered cubic (bcc), or hexagonal close-packed (hcp) structures. The formation of crystal lattices occurs as a result of bonding between atoms. Strong bonding forces between atoms...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... with a hexagonal close-packed structure show much less adhesion than other crystal structures. A high hardness, a large elastic modulus, and a low surface energy also suppress the adhesion of the metal ( Ref 13 , 14 ). The reason for the difference in adhesion between metals of similar hardness but different...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
... , or SSPAs) were machined from extruded hexagonal bar stock in two parts and joined by a crimping process at room temperature ( Fig. 1 ). Other coupling designs, termed male-stud and straight couplings , were also machined from extruded bar stock ( Fig. 1 ). Cracking and, in a few cases, complete fracture...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... are rotated with respect to each other (polycrystalline). In most metals, metallic bonds between atoms typically result in a crystalline structure, which in most engineering metals are face-centered cubic (fcc), body-centered cubic (bcc), or hexagonal close-packed (hcp) structures. The formation...