Inconel Stress Corrosion Cracking Index
The Inconel stress corrosion cracking index measures how well nickel superalloys resist crack-forming corrosion under tensile stress in aggressive media. Higher index means better resistance.
Physico-chemical Mechanism of Action
The Inconel stress corrosion cracking index (ISCI) quantifies how nickel superalloys behave under applied stress in corrosive environments. It takes into account both chemical corrosion and mechanical stress that cause crack-forming processes.
Metallurgical Relevance & Welding Risks
A low ISCI score means the material is more prone to crack-forming corrosion. This can lead to cracks and part failure, especially in chemically aggressive environments. A high ISCI score means better resistance to such processes.
Workshop Practice & Instructions
To improve ISCI and lower the risk of crack-forming corrosion, you should:
• Use high-quality nickel superalloys with high levels of stabilizing elements like titanium or aluminum.
• Make sure the weld is sound and strong to avoid stress concentration.
• Use proper corrosion protection, like coatings or chemical treatments.