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Effect of Prestrain on Delayed Fracture of Stainless Steel 304

Mohammad, Badaruddin and Ahmad, Suudi (2011) Effect of Prestrain on Delayed Fracture of Stainless Steel 304. Jurnal Teknik Mesin, 11 (2). pp. 200-207. ISSN 1411-9471

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    Abstract

    The purpose of this study is to investigate the relationship between delayed fracture and environment-assisted cracking of prestrained SS304 in terms of displacement versus time to failure in the environment containing 10% H2SO4 solution. Specimens were initially pre-strained in axial direction with the percentage of 5% and 1,0%. Corrosion testing was conducted according to the standard ASTM E-1681. The curve of deflection vs. time to fail and SEM of micrographs of specimens after testing, are studied to reveal the mechanism of crack formed. Data deflection and time until failure is only v obtained in static bending stress levels about 20% of the yield stress of material. The incubation period for the material without prestrain is 29.9 h, with 5%prestrain 4.17 h, whereas the prestrain of 10% is 32.5 h. The longer the incubation periods was undegone by specimens with the greater percentage of prestrain. It is attributed to strain hardening effect. For the specimen with low percentage of prestrain, cracks are found tend to be more dominant transgranular. In opposite to the greater percentage of prestrain, cracks tend to grow in inter-transgranular.

    Item Type: Article
    Uncontrolled Keywords: prestrain, delayed fracture,inter-trans granular, H2SO4 solution
    Subjects: T Technology > TJ Mechanical engineering and machinery
    T Technology > TN Mining engineering. Metallurgy
    Divisions: Fakultas Teknik > S1 Teknik Mesin
    Depositing User: Fakultas Teknik Mesin
    Date Deposited: 14 May 2013 11:19
    Last Modified: 14 May 2013 11:19
    URI: http://repository.unila.ac.id/id/eprint/193

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