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incipient melt point

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Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006257
EISBN: 978-1-62708-169-6
...Abstract Abstract Homogenization heat treatment can be useful for improving the performance and life of an alloy while in service or for improving the processability during fabrication and hot working. This article describes the identification of incipient melt point, slowest-diffusing elements...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006561
EISBN: 978-1-62708-290-7
... phase of the two materials. Such interactions can occur at temperatures 50 to 90% below the absolute melting point of either metal. Therefore, sticking (diffusion bonding) and melting (eutectic and incipient melting) can occur at much lower temperatures than expected. Knowledge of the temperatures...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001050
EISBN: 978-1-62708-161-0
..., weldability, and component mechanical properties. Base charge materials are layered in the relatively warm furnace, in a manner which recognizes and accommodates the elemental melting point of the material and bridging tendency. Only those materials with oxides that are relatively easily reduced...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
.... The beta phase dissolves first. Ferric chloride etch In incipient melting, the metal is exposed to a temperature close to but below the nominal melting point. When grain boundaries contain more impurities, their melting point is lower in comparison to the matrix. Initial damage causes the grain...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006266
EISBN: 978-1-62708-169-6
... depends on the extent and scale of solute segregation. Chemical diffusivities are dependent on the local chemistry. Critical to developing an optimized homogenization cycle is identifying the incipient melt point (IMP), slowest-diffusing element(s), and microstructural scale for homogenization. Methods...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005230
EISBN: 978-1-62708-187-0
... in incipient melting (i.e., local melting), which has deleterious effects on mechanical properties and the structural integrity of the casting. Incipient melting can be avoided by slowly heating the casting to dissolve phases that are susceptible to melting at low temperature. Normally, temperature variations...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001051
EISBN: 978-1-62708-161-0
...%) contents, proved to be unique with this castability feature. Multistep homogenization/solutioning treatments with tight temperature control were developed to completely solution the γ′ PWA 1480 without inducing incipient melting. Since 1982, PWA has had more than 5 million flight hours of successful...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002376
EISBN: 978-1-62708-193-1
... with other factors to be discussed, meant that the matrix was very sensitive to loading and other external conditions that could lead to incipient material cracking and thus to contact fatigue. In the early tests, large scatter in fatigue life was experienced. This persists and indicates that close...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003507
EISBN: 978-1-62708-180-1
... in the billet (Example 2). (a) Rod end showing locations of fractures at rough-ground areas at the parting line; in view A-A, dashed lines denote a rough-ground area, arrow points to a liquid-penetrant indication of an incipient crack. (b) Fracture surface, with beach marks indicating fracture origin at rough...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001049
EISBN: 978-1-62708-161-0
... . (e) At 760 °C (1400 °F). (f) Approximate solidus temperature. (g) Ref 14 Incipient melting temperatures of selected wrought superalloys Table 4 Incipient melting temperatures of selected wrought superalloys Alloy Incipient melting temperature °C °F Hastelloy X (Ni...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006507
EISBN: 978-1-62708-207-5
.... , Incipient Melting during Solution Heat Treatment of Al-Si-Mg and Al-Si-Cu-Mg Alloys , AFS Trans. , Vol 110 , 2002 , p 417 – 434 31. Wang G. , Bian X. , Wang W. , and Zhang J. , Influence of Cu and Minor Elements on Solution Treatment of Al-Si-Cu-Mg Cast Alloys , Mater. Lett...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006264
EISBN: 978-1-62708-169-6
... Mg 8 Cu 2 Si 6 phase is not soluble. The main problem in these alloys is to avoid incipient melting. Because of the “alphabet soup” of elements present in secondary versions of these alloys, there is always a certain amount of low-melting-point eutectic phase present in the solidified casting...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006804
EISBN: 978-1-62708-329-4
...), and Part 14 (fatigue). Other modes of degradation not directly related to the material of the vessels and piping are known to cause concern. For example, contact with a lower-melting-point material, such as cadmium or zinc with structural alloys, may lead to liquid metal embrittlement. Refurbishment...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003768
EISBN: 978-1-62708-177-1
... or the phosphorus content is high, incipient melting can start at the grain-boundary triple points ( Fig. 13 ). If more phosphide eutectic forms, with time at temperature, it tends to wet and spread along the grain boundaries. The resulting intergranular film that freezes upon quenching can be very detrimental...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005215
EISBN: 978-1-62708-187-0
... (and the incipient melting point is lowered) by 25 °C (45 °F). The solidification curve is shallow near the liquidus temperature and becomes progressively steeper as it approaches the eutectic temperature. The solute distribution curve (solute profile) is a plot of the solute content versus the fraction of solid...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005229
EISBN: 978-1-62708-187-0
... temperature. Care should be taken to avoid incipient melting during homogenization, since it could cause severe distortion of parts and degrade the properties of the casting. Homogenization temperature and time are selected based on the composition of the alloy and thermal history of the casting. Slow cooling...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001351
EISBN: 978-1-62708-173-3
... front, which runs along the flyer plate length. Pressure generated by the expansion of the explosive products accelerates the flyer plate downward at the point where the explosive is reacting and results in the desired impact on the stationary base plate. The principal parameters that affect bond...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006816
EISBN: 978-1-62708-329-4
... is a very slow process. As the metal finally cools below the boiling point of the quenching medium, cooling continues only by convective cooling or circulation of cooler liquid to the hot surface. These stages of cooling are illustrated in Fig. 14 . Fig. 14 Stages of cooling during quenching...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003209
EISBN: 978-1-62708-199-3
... occurs under the influence of pressure that is applied while the heated zone is in the plastic temperature range. Friction welding is classified as a solid-state welding process, in which joining occurs at a temperature below the melting point of the work metal. If incipient melting does occur...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003209
EISBN: 978-1-62708-199-3
... the melting point of the work metal. If incipient melting does occur, there is no evidence in the finished weld because the metal is worked during the welding stage. There are two methods of joining workpieces by FRW: continuous-drive FRW and inertia-drive FRW. More recently, radial friction machines have...