542
The elemental Mg distribution in the WAAM component was uniform , but obvious element enrichment occurred near the fusion zone of the substrate .
 material: Mg; concept or principle: distribution; manufacturing process: WAAM; machine or equipment: component; material: element; concept or principle: fusion zone; material: substrate
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:
 material: Mg; concept or principle: distribution; manufacturing process: WAAM; machine or equipment: component; material: element; concept or principle: fusion zone; material: substrate