THE INFLUENCE OF MICROSTRUCTURE OF 30MnB4 STEEL ON HYDROGEN-ASSISTED CRACKING
DOI:
https://doi.org/10.7494/mafe.2015.41.4.171Keywords:
hydrogen-assisted cracking, hydrogen trapping, zinc coating, toughened steelAbstract
This paper analyzes the problem of susceptibility to hydrogen-assisted cracking (fracture behavior) of zinc-coated screws made of 30MnB4 steel. Two samples (screws) were compared after proper and improper heat treatment affecting hydrogen solubility during the further galvanic process and resulting in different fracture modes. Both samples were loaded to failure by torsion. The fracture surface and microstructure of the samples were examined using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS).
Downloads
References
Gangloff R.P.: Critical Issues in Hydrogen Assisted Cracking of Structural Alloys. In: Shipilov S. (ed.): Environment Induced Cracking of Metals. Elsevier Science, UK, Oxford 2006
Stahle R.W., Hochmann J., McCright R.D., Slater J.E. (eds.): Stress Corrosion Cracking and Hydrogen Embrittlement of Iron Base Alloys. NACE, Houston, TX, 1977
Hydrogen in Metals. Procedings of the 2nd International Congress, Pergamon Press, Paris, France, 6–10 June 1977
Pawlowski B.: Effect of microstructure on stress corrosion cracking of Cr-Mn-Si-Ni steel. Materials and Corrosion, 37, 8 (1986), 448–451
Mazur A., Pawlowski B.: The stress corrosion cracking of high strength Cr-Mn-Si-Ni and Cr-Mo steels. Corrosion Science, 26, 1 (1986), 7–14
Pawlowski B., Mazur A. , Gorczyca S. : The effect of the tempering processes on the susceptibility to stress corrosion cracking of high strength steel. Corrosion Science, 32, 7 (1991), 685–691
Sanoğlu F.: The effect of tempering on susceptibility to stress corrosion cracking of AlSi 4140 steel in 33% sodium hydroxide at 80°C. Materials Science and Engineering A, 315, 1–2 (2001), 98–102
Gangloff R.P., Somerday B.P. (eds.): Gaseous hydrogen embrittlement of hydrogen in energy technologies, Vol. 2. Mechanism, modelling and future developments. Woodhead Publishing, UK, Cambridge (2012)
Demouchy S.: Hydrogen diffusion in spinel grain boundaries and consequences for chemical homogenization in hydrous peridotite. Contributions to Mineralogy and Petrology, 160, 6 (2010), 887–898
Urednicek M., Kirkaldy J.S.: Mechanism of iron attack inhibition arising from additions of aluminum to liquid Zn(Fe) during galvanizing. Zeitschrift für Metallkunde, 64 (1987), 649
Okafor I.C., O’Malley R.J., Prayakarao K.R., Aglan H.A.: Effect of zinc galvanization on the microstructure and Fracture Behavior of Low and Medium Carbon Structural Steels. Engineering, 5, 8 (2013), 656–666
Sieverts A. : The absorption of Gases by Metals. Zeitschrift für Metallkunde, 21 (1929), 37–46
Dadfarnia M., Sofronis P., Somerday B.P., Robertson I.M.: On the small scale character of the stress and hydrogen concentration fields at the tip of an axial crack in steel pipeline: effect of hydrogen-induced softening on void growth. International Journal of Materials Research, 99, 5 (2008), 557–570
Falkenberg R., Brocks W., Dietzel W., Scheider I.: Modelling the effect of hydrogen on ductile tearing resistance of steels.International Journal of Materials Research, 101, 8 (2010), 989–996
Ramachandran E.G., Ruge J.: The effect of hydrogen on the hardness of steel. Zeitschrift für Metallkunde 80, 5 (1989), 359–360
Wu X.Q., Kim I.S.: Influence of charged hydrogen on tensile behavior of a pressure vessel steel at relatively high temperatures. Zeitschrift für Metallkunde 94, 9 (2003), 1017–1020
Timmins P.F.: Solutions to Hydrogen attack in steels. Materials Park, OH, ASM International, 1997
