Embriftlement of TRIP steel in high-pressure hydrogen gas

Vandervoort, R.R.; Ruotola, A. W.; Raymond, E. L.

doi:10.1007/bf02645627

Cited by 6 publications

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“…It is well known that austenitic stainless steels(1)-(5) and other alloys (1)(6)(7) are embrittled by hydrogen gas as in the case of high strength steels(1)(8)- (14). The decreases in the reduction in area of the unnotched specimens and in both the reduction in area and the tensile strength of the notched specimens tested in a hydrogen gas have been used to measure the degree of HEE of low strength steels.…”

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Crack Propagation of High Strength Steels in Oxygen-doped Hydrogen Gas

Nakamura

Furubayashi

1987

Trans. JIM

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Crack propagation of high strength steels with the tensile strength of 1500 or 2000MPa was investigated at room temperature in an oxygen-doped gaseous hydrogen atmosphere. The doped oxygen gas suppressed the crack propagation in the range of stress intensity factor K below a critical value, at which a hydrogen induced crack began to propagate in a steady state under a load relaxation test i.e. a rising K test. The steady crack propagation rate was hardly affected by the content of doped oxygen gas. The critical value of K was dependent on both hydrogen and oxygen pressures and not determined only by the oxygen concentration in hydrogen. The effect of oxygen was explained by the assumption that oxygen gas decreased the number of absorption or adsorption sites of hydrogen on the crack tip surface and consequently the permeation of hydrogen flowing into a specimens decreased with increasing oxygen pressure.

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Crack Propagation of High Strength Steels in Oxygen-doped Hydrogen Gas

Nakamura

Furubayashi

1987

Trans. JIM

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The Role of Metallurgical Variables in Hydrogen-Assisted Environmental Fracture

Thompson

Bernstein

1980

Advances in Corrosion Science and Technology

125

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INTRODUCTIONThis chapter focuses on two kinds of environmental fracture, stress corrosion cracking (SeC) and hydrogen embrittlement, and discusses the role in such failures of a number of metallurgical variables. These include chemical composition; microstructural components such as precipitate type and structure, and grain size and shape; crystallographic texture; heat treatment and its effect on the foregoing variables; and processing, particularly the thermo mechanical treatments (TMT), which are attracting increased attention for property optimization. These variables are expected to be of great importance in the development of new engineering materials to meet demanding service conditions.In recent years, understanding of the role of metallurgical variables in hydrogen embrittlement has improved significantly. One purpose of the present review is to summarize this progress. Since hydrogen is believed to be broadly involved in many environmental cracking phenomena, it is a second purpose of the review to extend that improved understanding to at least some cases of Sec. It might be expected that similar role(s) of metallurgical variables would be observed for both hydrogen embrittlement and hydrogenassisted see, particularly when hydrogen plays a dominant role.The usual definition of see is that both a corrosive environment and a tensile stress (residual or applied) act together to cause cracking, which has a macroscopically brittle appearance. It is implicit in this definition that see is a phenomenon, not a mechanism, and it is so treated in this chapter. Hydrogen embrittlement is also a phenomenon, which mayor may not occur during sec. Hydrogen as a gas or as a species evolved from chemical or electrochemical reactions could be regarded as an see corrodent. But since classical hydrogen embrittlement studies have been conducted with hydrogen dissolved within the metal, which corrodents usually are not, such studies have been cited in the past as evidence against a link between see and hydrogen embrittlement. This review concludes, as have others, that such a conclusion cannot be general. There are now known to be a number of cases in which hydrogen participates in see fracture, and the accepted balance between hydrogen cracking and, say, anodic dissolution as components of see appears to need reappraisal or revision. It is a purpose of this chapter to identify such areas.It should be strongly emphasized that we do not accept the proposition that there must be a single causative process for Sec. There are indeed instances of purely dissolution processes, or purely hydrogen embrittlement processes, giving rise to what is generally described as Sec. But in many cases there appear to be contributions from both types of processes. This chapter emphasizes the hydrogen-related behavior in order to make maximum use of the new understanding of hydrogen embrittlement, but that emphasis should not be construed as being a mechanistic emphasis.The combined literature record on see and hydrogen embrittlement is very exten...

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The behavior of sensitized 309S stainless steel in hydrogen

Thompson

1974

Materials Science and Engineering

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Embriftlement of TRIP steel in high-pressure hydrogen gas

Cited by 6 publications

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Crack Propagation of High Strength Steels in Oxygen-doped Hydrogen Gas

Crack Propagation of High Strength Steels in Oxygen-doped Hydrogen Gas

The Role of Metallurgical Variables in Hydrogen-Assisted Environmental Fracture

The behavior of sensitized 309S stainless steel in hydrogen

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