H Delay | Crack _verified

Hydrogen-induced delayed cracking (HIDC), often called , is one of the most serious challenges in the welding and fabrication of high-strength steels. This phenomenon is particularly dangerous because it occurs hours or even days after the welding is completed, often passing initial inspections. 🔍 What is Hydrogen-Delayed Cracking?

This phenomenon is a subset of environmentally assisted cracking . Unlike mechanical overload, which causes immediate failure, H-delay cracking is time-dependent. The material appears sound immediately after manufacturing or installation, but fails unexpectedly during service.

Maintaining or raising the temperature immediately after welding (Hydrogen Bake-out).

Could you provide the source or a snippet of the report? That would help narrow it down to the exact interesting finding you're referencing.

: It occurs when a critical combination of four factors is met: high hydrogen levels, a susceptible microstructure (like martensite), high tensile stress, and ambient temperatures (typically below 200°C).

The term is also widely used by music producers looking for an unauthorized, "cracked" version of the . www.twi-global.com Defects / Hydrogen Cracks in Steels - Identification - TWI