1-20 of 184 Search Results for

dimensional change

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Image
Published: 01 January 2002
Fig. 23 Dimensional changes in a 70 mm (2.75 in.) steel (0.15% C, 1% Mn, 0.75% Cr, 0.85% Ni) bar after austenitizing and then quenching in water or oil More
Image
Published: 30 August 2021
Fig. 16 Dimensional changes when eutectoid steel is heated above the A 1 temperature (path ABCD ) and slow cooled (path DCBA ) or quenched (path DEF ). Steel expands when it is hardened to martensite. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001520
EISBN: 978-1-62708-235-8
... for a reheat treatment. For parts that cracked after pressure testing, excessive dimensional changes precluded the inclusion of a reheat treatment as a manufacturing step, and further failure was averted by carefully employing proper machining practices, avoiding abusive machining. Chromium plating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001712
EISBN: 978-1-62708-234-1
... to account for the dimensional change observed in the failed rolls. This paper details the failure analysis and resulting research it inspired. It also provides recommendations for cast material choice in highly nitriding atmospheres. Metal powders Nitrogen absorption Reduction furnaces Rolls...
Image
Published: 01 January 2002
Fig. 42 Micrograph of AISI 4140 steel as quenched and tempered. The microstructure is tempered martensite with quench cracking in the area of dimensional change. 91×; 2% nital etch. Source: Ref 27 More
Image
Published: 15 May 2022
Fig. 41 Expansion during heating for the gate end of a 16-pin dual-in-line package that was transfer molded and not postcured. Δ L , dimensional change; T g , glass transition temperature. Source: Ref 87 More
Image
Published: 30 August 2021
Fig. 4 Micrographs of cracks after heat treatment caused either by sharp radii or related machining problems. (a) 4140 steel as-quenched and tempered; microstructure is tempered martensite with quench crack at area of dimensional change. 2% nital etch. Original magnification: 100×. (b) 4142H More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
... austenite is converted to martensite is approximately 0.014 in./in. for eutectoid compositions. This illustrates the effect of carbon structure and steel transformation on residual stresses and distortion leading to dimensional changes. Fig. 5 Carbon content versus lattice parameters of (retained...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090277
EISBN: 978-1-62708-229-7
... included FEA (thermal gradients, nonlinear material behavior, residual stress, changes in wall thickness during the formation of U-bends, and TSP distortions near the ruptured tube) of three-dimensional solid models of the U-tubes. The conclusion was that distortion of the TSPs and resulting “pinching...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001601
EISBN: 978-1-62708-235-8
... flow forming of SAE 4130 steel Spring Back Spring back is the dimensional change of the formed part after the pressure of the forming roller has been released. It results from the strain produced by elastic recovery 8 and can cause dimensional distortions. When the load is released, elastic...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003558
EISBN: 978-1-62708-180-1
... caused by wear. Typically, it is the geometrical or profile aspects of these changes, such as a dimensional change, a change in shape, or residual thickness of a coating, that cause failure. However, a change in appearance and the nature of the wear damage also can be causes for failure. An example...
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
... state. Physical aging is particularly prevalent when an amorphous resin is cooled rapidly through the glass transition temperature. 3 The condition is aggravated when the plastic resin is molded over a metal insert, as dimensional changes often accompany physical aging, thus producing additional hoop...
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
... but also to prepare volatiles for further qualitative analysis. Thermomechanical Analysis Thermomechanical analysis (TMA) is a thermal analysis method in which linear or volumetric dimensional changes are measured as a function of temperature, time, or force ( Ref 2 ). Thermomechanical analysis...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001308
EISBN: 978-1-62708-215-0
... of weakened grain boundaries, again indicating that fatigue and grain boundary embrittlement were not factors in the cracking. Quench cracks in steels result from residual stresses created by dimensional changes during cooling, large temperature gradients between the surface and center, and the volume...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001329
EISBN: 978-1-62708-215-0
....” The National Association of Corrosion Engineers (NACE) has termed the dealloying phenomenon associated with aluminum-copper alloy systems as “dealuminization.” NACE further emphasizes that although color changes may be associated with dealloying, no cracks, pits, dimensional changes, grooving, or obvious metal...
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
... Thermomechanical analysis (TMA) is a thermal analysis method in which linear or volumetric dimensional changes are measured as a function of temperature, time, or force ( Ref 2 ). Thermomechanical analysis is used to study the structure of a polymeric material by evaluating the implications of the material...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003526
EISBN: 978-1-62708-180-1
... cause of failure, simply changing the material to one that is more resistant to the specific cause of failure will eliminate the problem. However, after a materials failure analysis is complete, often there is no material factor associated directly with the failure. Moreover, in some cases the material...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006773
EISBN: 978-1-62708-295-2
... examples of materials defects that cause failure. In many cases when there is clear evidence of a materials-related cause of failure, simply changing the material to one that is more resistant to the specific cause of failure will eliminate the problem. However, after a materials failure analysis...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... arc weld (GTAW) around the periphery. Visual Examination of General Physical Features Physical and dimensional features were recorded during the removal of the area of the tank containing the fracture. The general surface of the shell end was distorted from the normal flat contour...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006801
EISBN: 978-1-62708-329-4
... metal, and springback/dimensional. It discusses the processes involved in analytical tools that aid in characterizing the state of a formed part. In addition, information on draw panel analysis and troubleshooting of sheet forming failures is also provided. draw panel analysis fractures necks...