Alloy Phase Diagram Database™
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Welcome to Alloy Phase Diagram Database™

The ASM Alloy Phase Diagram Database allows subscribers to explore, search and view more than 36,500 binary and ternary phase diagrams and associated phase data for more than 6200 systems from their Web browsers.

To get started, enter one or more elements in the boxes at the top of the screen and click Go, or select Explore to browse by elements and systems, or select Search to build targeted queries.

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A congruent reaction is an isothermal reversible reaction in which both of the phases concerned have the same composition throughout the process. In the Ni-Ti system, two congruent reactions occur: L ? TiNi3 at 1380 °C and 25 at.% Ti, and L ? TiNi ht at 1310 °C and 50 at.% Ti. Other examples of congruent transformations include allotropic transformations and melting of pure metals. An incongruent reaction is one in which at least one of the phases experiences a change in composition, such as the eutectic reaction L ? TiNi3 + TiNi ht at 1118 °C and 39 at.% Ti.

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ASM Alloy Phase Diagram Database, P. Villars, editor-in-chief; H. Okamoto and K. Cenzual, section editors.

ASM International, Materials Park, OH, 44073, USA