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The microstructure and the phase composition of the aB-manufactured and the heat-treated samples were analysed in order to study the microstructure-microhardness correlation of Thymonel-2.XRD analysis of the aB-manufactured samples reveals the presence of the fcc γ- ( Fe , Ni ) phase only .
 microstructure, phase composition, heat-treated, samples, fcc, Fe, Ni, phase
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:
 microstructure, phase composition, heat-treated, samples, fcc, Fe, Ni, phase