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The microstructure of metals determines the mechanical properties of the part such as yield strength , ductility and hardness .
 concept or principle: microstructure; material: metals; concept or principle: mechanical properties; material: as; machanical property: strength; machanical property: ductility; machanical property: hardness
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: microstructure; material: metals; concept or principle: mechanical properties; material: as; machanical property: strength; machanical property: ductility; machanical property: hardness