6875
The aB-built sample has an ultrafine microstructure , with high residual stresses and non-equilibrium solid solute concentration of Si in the supersaturated Al matrix .
 concept or principle: sample; concept or principle: microstructure; machanical property: residual stresses; material: Si; material: Al
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: sample, microstructure, residual stresses, Si, Al 
Answer:
 concept or principle: sample; concept or principle: microstructure; machanical property: residual stresses; material: Si; material: Al