225
It is shown that the transient effects of the scan strategy create significant variations in the melt pool geometry and solid-liquid interface velocity , especially as the thermal diffusivity of the material decreases and the pre-heat of the process increases .
 transient, variations, melt pool, geometry, solid-liquid interface velocity, as, thermal diffusivity, material, pre-heat, process
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 transient, variations, melt pool, geometry, solid-liquid interface velocity, as, thermal diffusivity, material, pre-heat, process