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dimensional stability

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0065827
EISBN: 978-1-62708-221-1
... with superior properties was initiated. The nominal composition of Fe-0.50C-0.30Mn-0.40Si-5.00Cr-2.00Mo was developed which achieved the goals of edge retention, resistance to softening under frictional heating, wear resistance, ease of heat treatment, dimensional stability in heat treatment, grindability...
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Published: 15 May 2022
decreases part cost and increases dimensional stability. More
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
... in the polymer. Chain ends reduce packing efficiency, and the additional free volume available offers sites into which the polymer can be displaced under stress. Branching interferes with intermolecular bonding and has a significant effect on rheology and crystallinity. Branching lowers dimensional stability...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006923
EISBN: 978-1-62708-395-9
... g region eventually leads to a complete loss of dimensional stability. In a network polymer such as epoxy, the change is less severe but nonetheless produces significant softening and loss of mechanical properties. The importance of the glass transition as a material property can be understood...
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
... of their greater viscosity, but the resulting part is typically more dimensionally stable. While semi-crystalline materials are more effective at filling the mold, their dimensional stability is not as reliable due to the shrinkage created by their structure. Survive in the Intended Environment One...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006931
EISBN: 978-1-62708-395-9
... analysis (DMA) Elastic modulus, loss modulus, tan delta Mechanical properties, phase transitions, damping, softening cross linking Thermal-mechanical analysis (TMA) Penetration temperature, expansion coefficient Phase changes, T g , T m , dimensional stability, modulus, compliance, deflection...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006909
EISBN: 978-1-62708-395-9
... stress cracking. The degree of microdamage, whose presence adversely affects laminate stiffness and strength properties, environmental resistance, dimensional stability, and cyclic fatigue resistance, is related to residual stresses. The approach often employed for F-T conditioning is to subject...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001598
EISBN: 978-1-62708-232-7
.... In addition, the use of grain stabilized Pt/Rh alloy should be evaluated as a method to prevent grain growth. Wall thinning 80Pt-20Rh Pitting corrosion Creep fracture/stress rupture Background Americium and Curium (Am-Cm) were recovered in one of the Savannah River Site's (SRS) two chemical...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... formed by extrusion by the polymer manufacturer. When a monomer is chemically converted to a polymer, it takes the physical form of flakes or fluff. After the fluff is retrieved from the reactor, it is formed into pellets via extrusion. Consumer products that are extruded have a constant two-dimensional...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006912
EISBN: 978-1-62708-395-9
... of these forms of radiation could eventually lead to unexpected premature part failure. The most common type of radiation is UV light emitted from the sun as well as from fluorescent bulbs indoors. Plastic degradation can be retarded by adding UV stabilizers or eliminated by specifying inherently UV-stable...
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
.... Tempering Steel parts are often tempered by reheating after quench hardening to obtain specific values of mechanical properties. Tempering of steel increases ductility and toughness of quench-hardened steel and also relieves quench stresses and ensures dimensional stability. The tempering process...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
... and the degree of crystallinity, and as a result, the molded parts may warp, the dimensional stability of the parts may be impacted, and the parts may even become brittle. A scientific approach to processing demands rigorous and accurate control of process parameters and repeatability. As opposed...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006835
EISBN: 978-1-62708-329-4
... operations and sheet-forming operations. The general distinction here is that bulk working imposes material flow in all directions, while sheet-forming operations are typically limited to two-dimensional deformation. Metalworking operations are also classified as either primary metalworking (where mill forms...
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
..., however, it is somewhat notch sensitive. As a class of materials, polysulfone is known for good electrical insulation properties, excellent thermal stability, and exceptional hydrolytic stability. Because of its unique combination of thermal and hydrolytic properties, polysulfone is commonly used...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001798
EISBN: 978-1-62708-241-9
... consist of 3-dimensional (3D) crosslinked macromolecular network. CTBN, as the modifier, would greatly improve the toughness of epoxy resin by forming the second phase of rubber in the cured network, without affecting its chemical stability [ 5 , 6 ]. The resulting 3D crosslinked network is very compact...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006935
EISBN: 978-1-62708-395-9
... to handle reinforcements is defined in Table 1 . Process and materials effects on surface finish, dimensional stability, stability of properties at elevated temperatures, and impact resistance properties are also given in Table 1 . Effects are shown as directional only. With the very wide range...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006849
EISBN: 978-1-62708-395-9
...- and/or geometry-dependent. ASTM and ISO specimens are prepared for typical thermomechanical characterization of tensile, flexural, and impact properties; melt flow analyses; and thermal dimensional stability using deflection temperature under load (DTUL) testing. One globally recognized opportunity to compare...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
... in embrittlement and/or a loss of flexibility of the PVC part but also loss of the plasticizer chemical(s) into the environment. Plasticizer migration from flexible PVC products also results in some small amount of shrinkage of the products. This may be problematic if close dimensional tolerances are necessary...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006929
EISBN: 978-1-62708-395-9
... 0 Polyvinyl Chloride (PVC) 0.15 2.0 Engineered polymers present a challenge with respect to the identification of moisture absorption effects. Fillers and stabilizers improve the mechanical properties as well as the structural performance of engineered polymers in harsh environments...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006927
EISBN: 978-1-62708-395-9
... and Tolerances Different materials have different rates of shrinkage and will exhibit different degrees of dimensional stability; when the design will demand tight tolerances or dimensional stability, consult with the material supplier for recommendations. The mold will be built with a predetermined shrink...