Badaruddin, Mohammad and Suudi, Ahmad (2011) Effect of Prestrain on Delayed Fracture of Stainless Steel 304. Jurnal Teknik Mesin ITS, 11 (3). pp. 173-179. ISSN 1411-9471

Jurnal PRestrain Delayed ITS Badar Suudi.pdf

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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 percentage of 5% and 10%. 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 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 undergone 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. Keywords: prestrain, delayed fracture, inter-trans granular, H₂SO₄ solution

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
Divisions: Fakultas Teknik (FT) > Prodi Teknik Mesin
Depositing User: Ahmad Suudi
Date Deposited: 28 Oct 2020 01:56
Last Modified: 28 Oct 2020 01:56

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