4999
The circulate flows cause complex phenomena at the interface , which lead to the dilution of alloying elements and a variation in the microstructure of the first consolidated layer of SLM-AlSi10Mg ( as a result of variation in thermal gradient and solidification rate ) .
 concept or principle: interface; material: lead; material: alloying elements; concept or principle: variation; concept or principle: microstructure; process parameter: layer; material: as; concept or principle: variation; process parameter: thermal gradient; process parameter: solidification rate
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: interface, lead, alloying elements, variation, microstructure, layer, as, variation, thermal gradient, solidification rate 
Answer:
 concept or principle: interface; material: lead; material: alloying elements; concept or principle: variation; concept or principle: microstructure; process parameter: layer; material: as; concept or principle: variation; process parameter: thermal gradient; process parameter: solidification rate