4616
Although HIP led to complete dissolution of δ and γ′′ phase , stable NbC and TiN ( occasionally present ) particles were observed in the post-treated specimens .
 HIP, phase, TiN, particles
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:
 HIP, phase, TiN, particles