The effect of tempering on susceptibility to stress corrosion cracking of AISI 4140 steel in 33% sodium hydroxide at 80 degrees C

Date

2001-09-30

Author

Sarioglu, F

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

149
views

0
downloads

The stress corrosion cracking (SCC) behaviour of low alloy steel AISI 4140 was investigated in 33% sodium hydroxide solution at 80 degreesC under freely corroding conditions. Tempering temperatures of 450, 500, 550, 600 and 650 degreesC were used to produce a range of micro structures and strength levels. The relation between the crack growth rate and the stress intensity factor was obtained by constant displacement rate tests conducted on pre-cracked compact tension specimens. The crack growth behaviour and fracture mode were found to be sensitive to the presence of inclusions and to the microstructure of the steel. In case of insufficient tempering, intergranular cracking was observed in the band zone adjacent to the sulfide inclusions. This was attributed to hydrogen embrittlement of martensitic band structure. Disappearance of intergranular cracking in specimens tempered above 550 degreesC was explained by the difference of hydrogen diffusivity in various microstructures of quenched and tempered steels. The results were also interpreted with a model developed for low alloy steels in which the relation between the grain size and the plastic zone size was emphasized.

Subject Keywords

Caustic cracking, Stress corrosion cracking, 4140 steel, Heat treatment

URI

https://hdl.handle.net/11511/64009

Journal

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

DOI

https://doi.org/10.1016/s0921-5093(01)01198-4

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

The effects of various heat treating parameters on the hardness and microstructures of the experimental 18% nickel maraging steels Pektas, I; Atala, H (1998-01-01) The effect of the parameters of heat treatment on the experimental 18% maraging steels was studied using hardness tester, optical, scanning electron and transmission electron microscopy and X-ray metallography techniques. The specimens were solution treated at 815, 900, 1000, 1060 degrees C for periods between 1 and 4 h. After air-cooling to room temperature. a bce martensitic structure was obtained. The higher temperature (1060 degrees C) and longer time (4 h) of the solution treatment caused essentially h...
Three dimensional analysis of periodic cracking in FGM coatings under thermal stresses Dağ, Serkan; Erdogan, Fazil (2006-10-18) A three dimensional finite element method is used to examine periodic surface cracking problem in a functionally graded coating subjected to transient thermal loads. The ceramic/metal FGM coating is assumed to contain periodic semi-elliptical cracks and to be perfectly bonded to a homogeneous substrate. The composite structure is subjected to transient residual/thermal stresses. Temperature and displacement fields are computed using a three dimensional finite element approach. Finite element models are crea...
The effect of magnisium to sulfur ratio on the graphite morphology of graphite cast iron produced at differrent section thicknesses ELMABROUK, Omar; ERFAN, Osama M.; Kalkanlı, Ali (2011-09-18) This paper is concerned with the investigation of the effect of magnesium to sulfur ratio on the graphite morphology and estimation of the ranges of this ratio use to produce graphite cast iron at different section sections. The main factors affecting shape of graphite cast iron are the metallurgical structures and the section thicknesses. Cast iron of different shapes of graphite particles directly affect its thermo-mechanical properties. The nodular shape of these graphite particles such as in ductile cas...
The effect of copper on the microstructure and aging characteristics of an 0.8%C bainitic steel Yıldırım, Çağatay; Ögel, Bilgehan; Department of Metallurgical and Materials Engineering (2022-12-02) Copper causes hot shortness in steel. However, the 1:2 nickel-to-copper ratio avoids hot shortness phenomena. Also, it is known that an aging treatment applied to ferritic steels causes age hardening via the precipitation of Cu in the form of BCC copper-rich clusters. The latter phenomenon was studied extensively in low and medium-carbon steels. In this study, the copper precipitation in bainitic high-carbon steel and its effect on microstructure and properties are investigated. To achieve this, 0.8% C stee...
The Effects of heat treatment on microstructure, hardness and fatigue behavior of (AMS5659) 15-5 precipitation hardenable stainless steel Gören, Şahin; Gürbüz, Rıza; Department of Metallurgical and Materials Engineering (2018) In this study, effects of heat treatment parameters on microstructure, hardness and fatigue behavior of 15-5 precipitation hardenable stainless steels have been examined. Heat treatments have been conducted in three different steps homogenization, solutionizing and aging treatment at different temperatures and times. Microstructural analysis in terms of grain size and chemical composition analysis have been performed by optical and scanning electron microscope (SEM). Then, hardness measurements were applied...

Citation Formats

F. Sarioglu, “The effect of tempering on susceptibility to stress corrosion cracking of AISI 4140 steel in 33% sodium hydroxide at 80 degrees C,” MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, pp. 98–102, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64009.