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Applying standard heat treatment could remarkably enhance the tensile strength but decrease the ductility and make them comparable with wrought Inconel 718 alloy due to the precipitation of strengthening phases .
 concept or principle: standard; manufacturing process: heat treatment; machanical property: tensile strength; machanical property: ductility; material: wrought Inconel 718 alloy; concept or principle: precipitation; concept or principle: strengthening phases
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: standard; manufacturing process: heat treatment; machanical property: tensile strength; machanical property: ductility; material: wrought Inconel 718 alloy; concept or principle: precipitation; concept or principle: strengthening phases