Method and system for designing solution heat-treatment process of single-crystal superalloy

A system for designing a solution heat-treatment process of a single-crystal superalloy, comprising:

• an element concentration distribution extraction module configured to extract an element concentration distribution from an as-cast single-crystal superalloy sample;
• a solidus temperature distribution determination module configured to determine a solidus temperature distribution of the as-cast single-crystal superalloy sample based on a relationship between an element concentration and a solidus temperature according to the element concentration distribution;
• an incipient melting temperature determination module configured to denote a minimum solidus temperature in the solidus temperature distribution as an incipient melting temperature, and determine a current simulation time;
• a solution heat-treatment simulation module configured to subject the as-cast single-crystal superalloy sample to solution heat-treatment simulation by a phase-field method based on the incipient melting temperature to obtain a post-treatment element concentration distribution after a simulation time step of heat preservation at the incipient melting temperature;
• a segregation coefficient determination module configured to determine a segregation coefficient of each element based on the post-treatment element concentration distribution;
• a solution heat-treatment simulation iteration module configured to:
• when a segregation coefficient of any element is not within a preset range, update the element concentration distribution to the post-treatment element concentration distribution, and return to the step of determining a solidus temperature distribution of the as-cast single-crystal superalloy sample based on a relationship between an element concentration and a solidus temperature according to the element concentration distribution;
• a simulation result determination module configured to:
• when segregation coefficients of all elements are within the preset range, denote all incipient melting temperatures and corresponding current simulation times as solution heat-treatment simulation results;
• and
• a solution heat-treatment process determination module configured to determine an actual solution heat-treatment process of the as-cast single-crystal superalloy sample based on the solution heat-treatment simulation results.