Anomalies in the deformability of degassed metals at temperatures of reversible hydrogen embrittlement

Krylov, V. P.

doi:10.1007/bf01157072

Cited by 1 publication

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One reason might be the very complex nature of hydrogen effects in structural alloys, which makes temperature effects even harder to interpret [6]. It was found that pure metals like Fe, Ni, Ti, and V show more than one ductility minimum as a function of temperature [31]. That is, structural alloys might show more than one ductility minimum, but no experimental data could be identified in the open literature.…”

Section: Discussionmentioning

confidence: 99%

“…Multiple results were found in the open literature while investigating the effect of temperature upon the mechanical properties of steels with a bcc microstructure (ferrite, pearlite, bainite, martensite, etc., and combinations thereof); see Table 3. To simplify the presentation, the data were grouped into four steel classes, i.e., iron [30,31], carbon steels [5,30,[32][33][34][35], heat-treatable steels [13,32,[36][37][38][39][40][41][42][43][44], and high alloyed bcc steels [9,13,[45][46][47][48][49][50]. The T HE,max data for bcc steels scattered significantly.…”

Section: Steels With a Cubic Body-centered (Bcc) Latticementioning

confidence: 99%

See 1 more Smart Citation

Review on the Influence of Temperature upon Hydrogen Effects in Structural Alloys

Michler

Schweizer

Wackermann

2021

Metals

View full text Add to dashboard Cite

It is well-documented experimentally that the influence of hydrogen on the mechanical properties of structural alloys like austenitic stainless steels, nickel superalloys, and carbon steels strongly depends on temperature. A typical curve plotting any hydrogen-affected mechanical property as a function of temperature gives a temperature THE,max, where the degradation of this mechanical property reaches a maximum. Above and below this temperature, the degradation is less. Unfortunately, the underlying physico-mechanical mechanisms are not currently understood to the level of detail required to explain such temperature effects. Though this temperature effect is important to understand in the context of engineering applications, studies to explain or even predict the effect of temperature upon the mechanical properties of structural alloys could not be identified. The available experimental data are scattered significantly, and clear trends as a function of chemistry or microstructure are difficult to see. Reported values for THE,max are in the range of about 200–340 K, which covers the typical temperature range for the design of structural components of about 230–310 K (from −40 to +40 °C). That is, the value of THE,max itself, as well as the slope of the gradient, might affect the materials selection for a dedicated application. Given the current lack of scientific understanding, a statistical approach appears to be a suitable way to account for the temperature effect in engineering applications. This study reviews the effect of temperature upon hydrogen effects in structural alloys and proposes recommendations for test temperatures for gaseous hydrogen applications.

show abstract

Section: Discussionmentioning

confidence: 99%