Influence of preliminary plastic deformation of 12Kh18N12T steel on its mechanical properties

We have established that the preliminary plastic deformation of 12Kh18N12T austenitic steel causes cold-work hardening, which depends on the strain rate. With increase in the strain rate of specimens from 8∙10⁻⁴ to 417∙10⁻⁴ sec⁻¹, both strength (ultimate strength) and plasticity (percentage elongation) characteristics of 12Kh18N12T steel decrease. After holding of the preliminarily work-hardened steel at a temperature of 650°C, its strength increases, and its plasticity decreases. At the same time, the isothermal influence for 1 and 10 h does not facilitate intercrystalline corrosion of the steel during its holding in a corrosive medium for 24 h.     

Special features of generation of hydrogen from Kh18N10T steel in tensile loading

Translated from Fiziko-Khimicheskaya Mekhanika Materialov, Vol. 26, No. 4, pp. 47–50, July–August, 1990.     

Effect of radiogenic <Superscript>3</Superscript>He and hydrogen on the mechanical properties and structure of 12Kh18N10T steel

We present some results of studying the influence of high-pressure hydrogen (80 MPa), radiogenic ³He (with concentrations up to 130 appm), and their joint action on the mechanical properties and structure of 12Kh18N10T steel in the temperature range from 293 to 873 K. We describe the procedure of tests of specimens containing ³He. It has been established that the joint action of hydrogen and ³He affects slightly the ultimate strength of the specimens. Saturation of steel with radiogenic ³He by the method of “tritium trick” increases its yield strength. Hardening of the steel caused by helium increases with temperature and ³He concentration and, at 873 K, is accompanied by substantial embrittlement. We also present results of the fractographic analysis of specimens tested under different conditions. __________ Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 43, No. 5, pp. 47–52, September–November, 2007.     

Low-cycle fatigue of welded joints of 08Kh18N10T steel

We present systematized experimental data on low-cycle fatigue strength at 20 and 350°C for 08Kh18N10T steel and its welds, made by manual electric arc welding with EA-400/10U electrodes and argon-arc welding with a nonconsumable electrode and using Sv-04Kh19N11M3 filler wire. The data obtained are compared with the “Standards for Strength Analysis” PNAé G-7-002-86. __________ Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 43, No. 1, pp. 104–109, January–February, 2007.