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This study examines the impact of low-temperature heat-treatment on the microstructure and corrosion performance of direct metal laser sintered ( DMLS ) -AlSi10Mg alloy .
 concept or principle: impact; concept or principle: microstructure; concept or principle: corrosion; machine or equipment: direct metal laser; manufacturing process: DMLS; material: alloy
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: impact, microstructure, corrosion, direct metal laser, DMLS, alloy 
Answer:
 concept or principle: impact; concept or principle: microstructure; concept or principle: corrosion; machine or equipment: direct metal laser; manufacturing process: DMLS; material: alloy