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TECHNICAL PAPERS

Failure Studies on Flow Formed High Strength Pressure Vessel: A Case Study

[+] Author and Article Information
K. M. Rajan

Armament Research and Development Establishment, Pune-411021, India

K. Narasimhan

Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology, Bombay, Mumbai—400076, India

J. Pressure Vessel Technol 125(3), 253-259 (Aug 01, 2003) (7 pages) doi:10.1115/1.1593702 History: Received March 13, 2003; Revised May 06, 2003; Online August 01, 2003
Copyright © 2003 by ASME
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References

Dieter, G. E., 1991, Engineering Design, 2nd Edition, McGraw-Hill Int. Edition, McGraw-Hill, New York.
Steverding,  B., 1963, “The Feasibility of High Strength Alloys for Rocket Motor Cases,” Metallurgia, 63 , pp. 55–59.
Sernka,  R. P., 1964, “Some Considerations in Shear Spinning,” American Society for Metals, pp. 43–50.
Kalpakjian,  S., 1961, “A Study of Shear Spinnability of Metals,” ASME J. Eng. Ind., 93, pp. 478–484.
Kegg,  R. L., 1961, “A New Test Method for Spinnability of Metals,” ASME J. Eng. Ind., 83, pp. 119–124.
Metals Hand Book, 1988, 14 , Forming and Forging, 9th Edition, Metals Park, Ohio, ASH International, p. 6780.
“The Flow Turn Process,” 1965, J. of Sheet Metal Industries, pp. 103–105.
Wick, C. H., 1960, Chipless Machining, The Industrial Press Inc., New York.
Brown, W. F., 1997, Midin, Harold, Jr., and Ho., C. Y., Aerospace Structural Handbook, 1 , Purdue University.
Metals Hand Book, 1981, 9th Edition, 4 , Heat Treating, ASM Metals Park, Ohio, p. 120.
Structural Alloys Hand Book, 1987, 1 , Battle’s Columbus Division, 505 King Avenue, Columbus, Ohio.
Metals Hand Book, 1978, Properties and Selection, Iron & Steels, 1 , 9th Edition, ASM, pp. 504–522.
Langstone,  P. F., 1961, “Metallurgical Aspects of Production of High Strength Motor Cases,” Metallurgia, pp. 107–115.
Springer-Verlag., 1992, Steel: A Handbook of Materials Research and Engineering, I : Fundamentals, edited by Springer-Verlag and Verlag-Stahleisen, Germany.
Springer-Verlag., 1993, Steel: A Handbook of Material Research and Engineering, 2 : Applications, Germany, pp. 181–187.
Hickey,  C. F., and Thomas,  S., 1985, “Comparing a Split Heat of ESR/VAR 4340 Steel,” Metal Programs, pp. 69–74.
Rajan,  K. M., and Narasimhan,  K., 2001, “An Investigation of the Development of Defects During Flow Forming of High Strength Thin Wall Steel Tubes,” ASM J. of Practical Failure Analysis, 1 (5), pp. 69–76.
Kalpakjian,  S., and Rajagopal,  S., 1982, “Spinning of Tubes: A Review,” J. Applied Metal Working, 2 , pp. 211–223.

Figures

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Flow chart for the manufacture of flow formed pressure vessels
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Photograph of flow formed cracked tube
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Samples indicating inclusions ×100
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Samples indicating inclusions ×100
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Samples indicating inclusions ×100
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Samples indicating inclusions ×100
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Samples indicating inclusions ×100
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Sample indicating microcracks ×250
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Sample indicating microcracks ×500
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Sample indicating presence of microcracks ×250
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Micrograph of sample indicating cracks ×200
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Micrograph indicating a sorbitic structure ×250
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Optical micrograph showing presence of microcracks in the threaded region of the motor casing ×100
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Optical micrograph showing presence of microcracks along with the existing main crack ×100
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SEM micrograph of sample showing numerous cracks ×1000
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SEM micrograph of sample indicating step cracks ×100
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SEM micrograph of a fracture surface ×8000
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SEM micrograph of a fracture surface ×750

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