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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.c9001268
EISBN: 978-1-62708-215-0
.... Elongation Hardness Heat treatment Leaf springs, Mechanical properties Mechanical properties Plastic deformation Tensile strength Yield strength Inconel 718 UNS N07718 Heat treating-related failures Plastic bending The detent spring missile launcher failed in service during routine...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
.... structural components superplastic deformation boundary sliding dislocation creep high-strength low alloy steel decohesions traction testing grain size elongation Ti-Nb microalloyed ultrafine-grained steel (UGS steel, general) high-strength low-alloy steel (HSLA steel, general) A...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001839
EISBN: 978-1-62708-241-9
... steel with elongations barely approaching 8%, compared to 50% at the time of delivery weeks earlier. Based on the timing interval and the fact that failure occurred at operating stresses well below the yield point of the material, the failure is being attributed to hydrogen-induced damage. Potential...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001130
EISBN: 978-1-62708-214-3
... failed seat were examined using SEM fractography, tensile and ductility tests, and spectrographic chemical analysis. The test results showed that the steel used did not meet the manufacturer's specifications for ductility (elongation). In addition, the small-diameter punched holes caused a stress...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001296
EISBN: 978-1-62708-215-0
... Abstract A 52000 bearing steel valve guide component operating in the fuel supply system of a transport aircraft broke into two pieces after 26 h of flight. The valve guide fractured through a set of elongated holes that had been electrodischarge machined into the component. Analysis indicated...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0048801
EISBN: 978-1-62708-229-7
... longitudinal seam weld was revealed to have lower elongation and a shear type failure rather than the cup-cone failures. It was concluded that the welded longitudinal seam exhibited embrittlement. A low-ductility intergranular fracture that progressed through the weld metal was revealed by scanning electron...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001208
EISBN: 978-1-62708-229-7
... additive material should have been considered because it could have equalized stresses due to its high elongation. Most probably, however, a material of lower hardenability should have been selected for the spindle if high operating properties were of paramount importance. Cracking (fracturing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001687
EISBN: 978-1-62708-220-4
... Abstract Microstructural examinations on transverse cross sections of a steam reformer tube, showed the presence of large macrovoids elongated in the radial direction and emanating from the internal surface of the tube. The macrovoids were located at the interdendritic regions, and were...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001124
EISBN: 978-1-62708-214-3
.... Visual and metallographic examinations clearly established that the fractures/cracks occurred at the wire joints. The fractures/cracks were singular and brittle, with no necking or plastic deformation. The wire joining process, probably cold-pressure upset welding, resulted in reorientation of elongated...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001132
EISBN: 978-1-62708-214-3
... propane torch, exhibited a resolidified crystalline structure in the solder of the copper cups when examined by scanning electron microscopy (SEW ( Fig. 3 ). The failed unit, on the other hand, exhibited elongated grains as a result of plastic deformation ( Fig. 4 ). No evidence of melting was detected...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001780
EISBN: 978-1-62708-241-9
... point phase results in hot forming difficulties and ruptures [ 1 ]. The addition of sufficient manganese preferentially converts the sulfur to higher melting point manganese sulfides, which are elongated during hot working because of their high plasticity at these temperatures. Inclusion shape control...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001738
EISBN: 978-1-62708-220-4
... information. Therefore, taking boat samples is necessary. It had been concluded that tertiary creep starts at 7% elongation. This will be used as rejection criterion for the bottom manifolds in the future. Diffusional creep limited by grain-boundary diffusion (Coble creep) is the acting deformation...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001125
EISBN: 978-1-62708-214-3
... the fracture, at the nearby heat-affected zone (HAZ), and at a location remote from the break. Very fine pearlite with a little martensite, degenerate pearlite, and elongated pearlite colonies, respectively, were revealed ( Fig. 5 ). These microstructures were interpreted as resulting from heat...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001303
EISBN: 978-1-62708-215-0
... (20 ksi) or higher, a tensile strength of 210 MPa (30 ksi), and true ductility of 1.5 to 2.0%. Plaster-mold castings of this alloy weighing 14 kg (30 lb.) have consistently met specification minimum values of 303 MPa (44 ksi) tensile strength, 228 MPa (33 ksi) yield strength, and 1.5% elongation at a...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001100
EISBN: 978-1-62708-214-3
... ( Fig. 8 ), with an elongated grain structure near the bend radius ( Fig. 9 ). Shallow cracks were present at the inner surface of the small radius bend ( Fig. 10 ), with evidence of zinc penetration into the cracks ( Fig. 11 ). Fig. 8 Micrograph showing typical structure in longitudinal cross...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0091028
EISBN: 978-1-62708-229-7
... throughout the entire wall thickness. 2% nital etch. 297× Chemical analysis confirmed that the tube satisfied the specified compositional requirements, that is, a 2.25Cr-1Mo alloy steel. The strength determined on a sample remote from the fracture was higher than required, but the elongation at...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001040
EISBN: 978-1-62708-214-3
... very low mileage under a normal load situation. The axle was made of AISI 4140 steel oil quenched and tempered to AAR specification M101. Specified mechanical properties were: ultimate tensile strength, 830 MPa (120 ksi) (min); yield strength, 690 MPa (100 ksi) (min); elongation, 15% (min). Two...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001246
EISBN: 978-1-62708-224-2
... the wires in the original condition as found in the undamaged wires and in the untarnished portion of the damaged wires. It consists of very long elongated grains of fine lamellar pearlite with little ferrite: the typical patent structure of a cold drawn wire. In the tarnished portion, however, the...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001474
EISBN: 978-1-62708-224-2
.... 29.00 Elongation % Broke outside gauge length The ductility of the material was demonstrated by the fact that a bend test piece taken adjacent to the fracture and orientated parallel to the tensile test piece deformed satisfactorily through 90° when bent over a former having a diameter of...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001819
EISBN: 978-1-62708-241-9
... matrix) is about 50 μm, which can be considered an acceptable value for a duplex stainless steel. The slightly elongated shape of the austenitic islands is also normal for a duplex stainless steel. Figure 3 , obtained in a scanning electron microscope (SEM), presents microscopic aspects of the fracture...