Toni Agung Priambodo, Apriardi Ihlas


Reinforced concrete is a common structural material used in the modern era. High tension steel provides strength to the concrete structure to reduce internal tensile forces and eliminate cracking. Failure of reinforcing steel causes the reinforced concrete to not have optimal strength and has the potential to cause failure in the main structure. The present paper describes the investigation of the failure case in the prestressed concrete bar (PC bar) during the manufacture of prestressed or pre-tensioned concrete. The failure occurred in the head section area during the initial drawing process. The chemical composition and tensile test showed the raw material complied to the manufacturer's specification. The fractography and microscopic examination of the failure area showed the characteristics of brittle fracture. Stress concentration in the head section and the tempering process of PC bar after quenching process at an inappropriate temperature caused temper embrittlement to be the cause of failure during the initial drawing process.


failure analysis, prestressed concrete, PC bar, tempering, temper embrittlement

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C. W. Dolan and H. R. Hamilton, Prestressed Concrete. Springer International Publishing, 2019. doi: 10. 1007/978-3-319-97882-6.

X. Li, J. Zhang, B. Liu, H. Jiang, and X. Min, “Bond stress distribution analysis between non-prestressed steel strand and concrete in novel beam-to-column connection,” Eng. Struct., vol. 242, p. 112523, Sep. 2021, doi: 10.1016/ j.engstruct.2021.112523.

H. Wang, G. Gan, K. Zeng, K. Chen, and X. Yu, “Study on Flexural Performance of Prestressed Concrete Steel Strand Square Piles with Reinforcement,” Buildings, vol. 12, no. 11, p. 1801, Oct. 2022, doi: 10.3390/buildings12111801.

R. Gilbert and N. Mickleborough, The Design of Prestressed Concrete. Taylor & Francis, 1990.

“JIS G 3137:2020. Small diameter steel bars for prestressed concrete,” Japanese Industrial Standard Committe, 2020.

R. E. Smallman and R. J. Bishop, “Strengthening and toughening,” in Modern Physical Metallurgy and Materials Engineering, Elsevier, 1999, pp. 259–296. doi: 10.1016 /B978-075064564-5/50008-2.

M. A. Gebril, M. S. Aldlemey, and A. F. Kablan, “Effect of Tempering on Mechanical Properties and Corrosion Rate of Medium and High Carbon Steel,” Adv. Mater. Res., vol. 685, pp. 81–85, Apr. 2013, doi: 10.4028 / AMR.685.81.

S.-J. Yoo, D.-L. Lee, and D.-T. Chung, “Prediction of cold heading quality with high strain rate compression tester,” Wire J. Int., vol. 30, no. 9, pp. 84–89, 1997.

T. A., K. F., B. V., Z. M., and F. B., “Holistic crack prediction in cold forging processes through a temporal and phenomenological distinguishing crack criterion,” in Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011, 2011, pp. 929 – 934. [Online]. Available: https://www. ard/record.uri?eid=2-s2.0-84898063031&partnerID=40&md5=52dd9cf795c58fc380279602110f3717

“Visual Examination and Light Microscopy,” in Fractography, ASM International, 1987, pp. 91–165. doi: 10.31399/asm.hb.v12.a0001834.

I. Özdemir, Ü. Cöcen, and K. Önel, “The effect of forging on the properties of particulate - SiC - reinforced aluminium-alloy composites,” Compos. Sci. Technol., vol. 60, no. 3, pp. 411–419, Feb. 2000, doi: 10.1016/S0266-3538(99)00140-2.

V. Tvergaard and A. Needleman, “Analysis of the cup-cone fracture in a round tensile bar,” Acta Metall., vol. 32, no. 1, pp. 157–169, Jan. 1984, doi: 10.1016/0001-6160(84)90213-X.

A. Sabih and J. A. Nemes, “Internal ductile failure mechanisms in steel cold heading process,” J. Mater. Process. Technol., vol. 209, no. 9, pp. 4292–4311, May 2009, doi: 10.1016/ J.JMATPROTEC.2008.11.023

V. V Zabil’skii, “Temper embrittlement of structural alloy steels (review),” Met. Sci. Heat Treat., vol. 29, no. 1, pp. 32–42, 1987, doi: 10.1007/BF0073 5489.

S. Mackenzie, “Overview of the Mechanisms of Failure in Heat Treated Steel Components,” in Failure Analysis of Heat Treated Steel Components, ASM International, 2008, pp. 65–66. [Online].




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