Material structure prediction apparatus, product manufacturing method and material structure prediction method

A method of manufacturing a product from a material that exhibits phase transformation from a mother phase to a precipitated phase in accordance with a temperature variation, the manufacturing method comprising:

• controlling a temperature to apply the temperature variation to the material;
• calculating temperatures at calculation points in a calculation target region of the material, based on a temperature condition for controlling the temperature;
• calculating a nucleation count in the calculation target region, based on the calculated temperatures at the calculation points;
• determining, from the calculation points, a precipitated phase generation point where a nucleus of the precipitated phase is generated, based on the calculated nucleation count;
• calculating a grain growth of the precipitated phase at the determined precipitated phase generation point;
• predicting a structure of the material, based on the calculated grain growth of the precipitated phase;
• calculating shape characteristic value of crystal grain in the precipitated phase, based on the predicted structure of the material;
• calculating a statistic of shape characteristic values, based on the calculated shape characteristic value;
• and
• manufacturing the product, based on the calculated statistic.

A material structure prediction method of predicting a structure of a material that exhibits phase transformation from a mother phase to a precipitated phase in accordance with a temperature variation, the material structure prediction method comprising:

• calculating temperatures at calculation points in a calculation target region of the material, based on a temperature condition for applying the temperature variation to the material;
• calculating a nucleation count in the calculation target region, based on the calculated temperatures at the calculation points;
• determining, from the calculation points, a precipitated phase generation point where a nucleus of the precipitated phase is generated, based on the calculated nucleation count;
• calculating a grain growth of the precipitated phase at the determined precipitated phase generation point;
• and
• predicting a structure of the material, based on the calculated grain growth of the precipitated phase.