5152
Rapid melt pool formation and solidification during the metal powder bed process Selective Laser Melting ( SLM ) generates large thermal gradients that can in turn lead to increased residual stress formation within a component .
 material: melt pool; concept or principle: solidification; material: metal powder; machine or equipment: bed; manufacturing process: Selective Laser Melting; manufacturing process: SLM; process parameter: thermal gradients; material: lead; machanical property: residual stress; machine or equipment: component
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: melt pool, solidification, metal powder, bed, Selective Laser Melting, SLM, thermal gradients, lead, residual stress, component 
Answer:
 material: melt pool; concept or principle: solidification; material: metal powder; machine or equipment: bed; manufacturing process: Selective Laser Melting; manufacturing process: SLM; process parameter: thermal gradients; material: lead; machanical property: residual stress; machine or equipment: component