Vol 10, No 2 (2006) > Articles >

Stress Corrosion Cracking Behavior of Stainless Steel 304 in the Sulfuric Acid Environment Due to Prestrain

Mohammad Badaruddin 1 , Ahmad Suudi 1 , Arinal Hamni 1

Affiliations:

  1. Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung, Bandar Lampung 35145, Indonesia

 

Abstract:

The aim of  research is to investigate the effect of prestrain  on the stress corossion cracking behavior of AISI 304 stainless steel in the sulfuric acid of 10% concentration  under the static cantilever loading according to ASTM E-1681 standart. The specimen of 304 Stainless steel was strain up over the yield strength until reaching the uniform strain of 5% and 10% using servopulser UTM 9506 under the  displacement control of 0,3 mm/sec. The results of test  show that the prestrain of 5%  specimen is faster  failure than both  of  the prestrain of 10% and unprestrain specimen. It was caused by both of the decrease of ductility and  the short   incubation period. The change of deflection could be only recorded under  the loading 20% of yield strength. Intergranular crack was the prestrain of 10% specimen under the static loading of  616 MPa. Whereas,  for the prestrain of 10% specimen transgranular crack  was found under the static loading of 554,4 MPa. The prestrain of 5% specimen was mixed crack  under the static loading of 369.6 MPa. Higher dislocation density on the layer surface due to plastic deformation with increasing the percentage of pre-strain, so more difficult hydrogen diffused into the crack tip. Consequently, The incubation period can be prolonged.

Keywords: stress corrosion cracking, incubation period, prestrain, trans-inter granular cracking
Published at: Vol 10, No 2 (2006) pages: 67-71
DOI:

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