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Hot tears

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... inspection. Casting defects including porosity, oxide films, inclusions, hot tears, metal penetration, and surface defects are reviewed. Liquid penetrant inspection, magnetic particle inspection, eddy current inspection, radiographic inspection, ultrasonic inspection, and leak testing for castings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130133
EISBN: 978-1-62708-284-6
... substance that is foreign and insoluble to the matrix; particles of a foreign material in metallic matrix. The particles are usually compounds, such as oxides, sulfides, or silicates but may be of any substance that is foreign and insoluble to the matrix. Hot tears —occur when the equivalent plastic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000111
EISBN: 978-1-62708-313-3
... reducing hot tearing during solidification. Tantalum also reduces hot tearing, whereas high levels of chromium increase hot tearing. The main drawback to adding hafnium is that it is a very reactive element that attacks mold materials and furnace linings, leading to the formation of brittle inclusions...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410253
EISBN: 978-1-62708-280-8
... Fig. 10.4 Tensile test bars, hardness and microstructure locations All castings will be visually inspected in heat-treated condition and before packing. The casting surfaces must be free from hot tears, cracks, surface sinks, and excessive mold coat marks. Table 10.3 shows the allowable...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... performance and the effect of casting design on the tendency for discontinuities to form during the casting process. Important types of casting discontinuities include porosity, inclusions, oxide films, second phases, hot tears, metal penetration, and surface defects. A number of typical casting defects...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000059
EISBN: 978-1-62708-313-3
... reduced incrementally over the years of superalloy evolution because of the propensity of chromium to form tcp phases. High levels of chromium can also lead to hot tearing (the formation of cracks in a casting during the final stages of solidification) during the casting of columnar-grained alloys ( Ref...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410163
EISBN: 978-1-62708-265-5
.... Van Nostrand Company , New York , 1973 , p 568 – 608 9.45 Flemings M.C. and Nereo G.E. , Macrosegregation Part I , Trans. TMS-AIME , Vol 239 , 1967 , p 1449 – 1461 9.46 Rappaz M. , Farup I. , and Drezet J.-M. , Study and Modeling of Hot Tearing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170242
EISBN: 978-1-62708-297-6
...%, which formerly were prevalent, contribute to hot shortness and low elongation at very high temperatures and frequently are the cause of hot tears in castings and underbead cracking in weldments. It is particularly advantageous to keep phosphorus at the lowest possible level in the grades that are welded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140007
EISBN: 978-1-62708-335-5
... foundry practices are required to minimize hot tearing and shrinkage defects. Tin is the major alloying element in compositions developed for bearing applications. It has also been employed with bismuth, lead, and cadmium at lower concentrations to provide free-machining properties. The 850-series...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260187
EISBN: 978-1-62708-336-2
... hot tearing or speed cracks occurred in the extruded section. Their results show that the extrudability of these alloys is strongly dependent on some of the alloying constituents, such as Mg, while only slightly dependent on Zn content. The addition of certain percentages of Cu and Zr also reduces...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610025
EISBN: 978-1-62708-303-4
... are helpful in reducing problems. Stresses induced during casting can result from the shrinkage of the metal during solidification. These stresses can be great enough to cause the formation of cracks while the casting is solidifying, commonly known as hot tearing. After approximately 80% of solidification...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240201
EISBN: 978-1-62708-251-8
... tempering are helpful in reducing problems. Stresses induced during casting can result from the shrinkage of the metal during solidification. These stresses can be great enough to cause the formation of cracks while the casting is solidifying, commonly known as hot tearing. When approximately 80...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410247
EISBN: 978-1-62708-280-8
... X … X X X Excellent surface finish X … … … … … X X X X Near-net shape, high-dimensional capability X X … … … – X X X X Castability, hot tear tendency with Al-Cu, Al-Mg and Al-Zn alloys X X ? … ? … … … … … Large sizes X X … … X X X X...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.9781627083355
EISBN: 978-1-62708-335-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.9781627082914
EISBN: 978-1-62708-291-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420429
EISBN: 978-1-62708-310-2
... somewhat larger than would be expected from free contraction alone. This can lead to difficulties in accurately designing the size of the pattern, because the contraction allowance is not easy to quantify. Mold constraint during cooling can also lead to problems such as hot tearing or cracking...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170003
EISBN: 978-1-62708-297-6
... and to ensure production of sound welds. Another factor that must be considered, however, is the mechanical constraint on the freezing metal that the weld joint produces. If there are any low-melting second-phase materials in the grain boundaries, hot tears can form in these regions as the weld metal shrinks...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560081
EISBN: 978-1-62708-291-4
... of the material to lamellar tearing. Improvement was achieved by adding certain alloying elements—rare earth metals in particular—which prevent the formation of type II sulfides and that form sulfides that do not deform significantly during hot rolling. The sulfide inclusions in a hot-rolled plate then have...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410091
EISBN: 978-1-62708-280-8
... 5.1 Cast alloy designations Alloy Designation (a) General applications Aluminum (min 99%) 1XX.X High conductivity electrical applications—rotors Al-Cu alloys 2XX.X High-strength cast parts with special care to prevent hot tears Al Alloys with (Si+Mg), (Si+Cu), or (Si+Mg+Cu...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140039
EISBN: 978-1-62708-335-5
... and Predicting Hot Tearing During Solidification , AFS Trans. , Vol 106 , 1998 • Flemings M.C. , Behavior of Metal in the Semisolid State , Metall. Trans. B , Vol 22B , 1991 10.1007/BF02661090 • Gruzleski J.E. et al. , Hydrogen Measurement by Telegas in Strontium Treated A356...