Die Retinoidbehandlung von Larynxpräkanzerosen

Mechanisms of stress relief cracking in titanium stabilised austenitic stainless steel

“…The interaction between solute atoms and dislocations reduces the recovery rate and maintains large values for the local internal stresses responsible for the nucleation of creep cavities along the grain boundaries. This mechanism proposed for stress relief cracking is different from the explanation which is usually given in the literature devoted to this phenomenon [1][2][3][4][5][6][7].…”

“…As stated in Section 1, the stress relief cracking of 321 HAZs is usually attributed to an hardening effect produced by Ti(C,N) precipitation during service at high temperatures [4][5][6][7]. It is assumed that intergranular cracking occurs in service when the ductility of the grains is no longer sufficient to sustain the relaxation of welding and clamping stresses.…”

“…Many studies have linked this phenomenon to thermal aging, and more specifically to titanium carbide precipitation (in AISI 321 steel) which modifies the HAZ behaviour [7]. Fig.…”