hello everyone. In accordance with the Ti-Cu phase diagram, welding these two metals, forms brittle IMCs like Ti2Cu and TiCu. does anybody know if there is any post-heat treatment cycle to remove or at least decrease these IMCs?
thank you for your favor.
High-temperature heat treatment (> 700°C) after welding cannot eliminate Ti-Cu intermetallic compounds, but make them more pronounced. You can heat treat the welded part at relatively low temperatures (300-400°C) to reduce mechanical stress.
thank you dear Vadim Verlotski, as I understood it's kind of Stress Relieving for the final joint. does it has any effect on IMCs thickness or distribution as well?
No, heat treatment below 400°C will not affect the microstructure of the material. It only serves to reduce the residual stresses.
You should perform HT at 850C for 30min and then quenched in cold water.
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