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Published: 01 January 2005
Fig. 12 A typical calibration curve for the ring compression test. Change in internal ring diameter versus change in specimen height, for a 6:3:2 ring. Source: Ref 21 More
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Published: 01 January 2000
Fig. 18 Schematic of ring compression test. Revised from Ref 4 More
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Published: 01 January 2000
Fig. 19 Theoretical calibration curves for ring compression test. The ratio is for outside diameter:inside diameter:thickness. (a) 6:3:2 ratio. (b) 6:3:1 ratio. (c) 6:3:0.5 ratio. Source: Ref 4 More
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Published: 31 December 2017
Fig. 8 Ring compression test simulations with constant friction at two heat transfer coefficients. (a) U = 5 kW/m 2 °C and m = 0.2 at 20% reduction in thickness. (b) U = 5 kW/m 2 °C and m = 0.2 at 80% reduction in thickness. (c) U = 20 kW/m 2 °C and m = 0.2 at 20% reduction More
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Published: 31 December 2017
Fig. 10 Temperature profiles in simulations of ring compression test. (a) Constant heat transfer coefficient of U = 20 kW/m 2 °C and m = 0.2 at 20% reduction in thickness. (b) Constant heat transfer coefficient of U = 20 kW/m 2 °C and m = 0.2 at 80% reduction in thickness. (c More
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009009
EISBN: 978-1-62708-185-6
... Abstract This article describes the use of compression tests, namely, cylindrical compression, ring compression, and plane-strain compression tests at elevated temperatures. It discusses the effects of the temperature, strain rate, and deformation heating on metals during the cylindrical...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009007
EISBN: 978-1-62708-185-6
..., compression test, and bend test. It examines specialized tests including plane-strain compression test, partial-width indentation test, secondary-tension test, and ring compression test. The article explains that workability is determined by two main factors: the ability to deform without fracture...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... tests, such as the tension test, ring compression test, plane-strain compression test, bend test, indentation test, and forgeability test. It concludes with information on the role of the finite-element modeling software used in workability analysis. bend test bulk forming processes cracking...
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Published: 31 December 2017
Fig. 11 Film thickness and heat transfer coefficient evolution for a ring compression test at 80% reduction in thickness More
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Published: 31 December 2017
Fig. 9 Von Mises strain using varying friction and heat transfer models for a ring compression test. (a) 20% reduction in thickness. (b) 80% reduction in thickness More
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003294
EISBN: 978-1-62708-176-4
..., and rod impact (Taylor) test. The flyer plate impact test, expanding ring test, split-Hopkinson bar in tension, and a test using a rotating wheel used for high strain rate tension are also discussed. high strain rate compression test cam plastometer test the drop tower compression test flyer...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005417
EISBN: 978-1-62708-196-2
... and motor oil industries, are often inappropriate for the metal-forming industries. Instead, test methods adapted to each class of forming operation are used, such as the ring compression test (forging) ( Ref 2 ), the plane-drawing test or the drawing-under-bending test (drawing) ( Ref 3 ), and the plane...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003322
EISBN: 978-1-62708-176-4
... ′ 5.8417 A , s −1 1.2519 × 10 16 See Eq 3 Fig. 16 Plot of In( Z ) versus In[sinh(ασ)] to determine the values of n ′ and A Testing for the Friction Coefficient For bulk forming, the friction coefficient can be measured by a ring compression test ( Ref 32...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006370
EISBN: 978-1-62708-192-4
... that this characteristic length was the same as the spacing between asperities. Figure 7 shows the results when this model is compared to experiments conducted by Nshama and Jeswiet ( Ref 32 ). Nshama and Jeswiet reported that the average film heat transfer coefficients for unlubricated ring compression tests...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005508
EISBN: 978-1-62708-197-9
... Abstract This article describes the most commonly used test methods for determining flow stress in metal-forming processes. The methods include tension, ring, uniform compression, plane-strain compression, torsion, split-Hopkinson bar, and indentation tests. The article discusses the effect...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001032
EISBN: 978-1-62708-161-0
... is cut out so that the fracture area can be photographed or traced on an optical comparator. Ring Compression Test When a flat ring-shaped specimen is upset in the axial direction, the resulting change in shape depends only on the amount of compression in the thickness direction and the frictional...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006424
EISBN: 978-1-62708-192-4
... life for a given process. Methods to Measure Lubricant Effectiveness and Wear Measuring Friction for Lubricant Effectiveness In forging, one of the most common ways to measure friction and thus determine the effectiveness of a lubricant is the ring compression test. This technique...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003259
EISBN: 978-1-62708-176-4
... and describes gripping techniques of test specimens. It analyzes test diagnostics and reviews the use of computers for gathering and reducing data. Emphasis is placed on universal testing machines with separate discussions of equipment factors for tensile testing and compressing testing. The influence...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009008
EISBN: 978-1-62708-185-6
... Abstract A cylindrical specimen compressed with friction at the die surfaces does not remain cylindrical in shape but becomes bulged or barreled. Tensile stresses associated with the bulging surface make the upset test a candidate for workability testing. This article discusses test-specimen...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003848
EISBN: 978-1-62708-183-2
... conditions for elastomer parts are: Under ambient conditions, low humidity, dark, and ozone and radiation-free environment Stored lying flat, without distortion of the original shape Note that preassembled O-rings, such as in a mechanical seal, will take some compression set during storage...