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The microstructural features were formed due to rapid solidification at an extremely high cooling rate in the SLM process , which provides important insights into controlling the strength of Al–Si-based alloys fabricated by SLM .
 concept or principle: microstructural; manufacturing process: rapid solidification; process parameter: cooling rate; manufacturing process: SLM; concept or principle: process; machanical property: strength; material: alloys; manufacturing process: SLM
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: microstructural, rapid solidification, cooling rate, SLM, process, strength, alloys, SLM 
Answer:
 concept or principle: microstructural; manufacturing process: rapid solidification; process parameter: cooling rate; manufacturing process: SLM; concept or principle: process; machanical property: strength; material: alloys; manufacturing process: SLM