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In this study residual stresses were determined in titanium alloy ( Ti-6Al-4V ) and Inconel 718 samples produced using selective-laser-melting ( SLM ) additive manufacturing .
 machanical property: residual stresses; material: titanium alloy; material: Ti-6Al-4V; material: Inconel 718; manufacturing process: SLM; manufacturing process: additive manufacturing
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: residual stresses, titanium alloy, Ti-6Al-4V, Inconel 718, SLM, additive manufacturing 
Answer:
 machanical property: residual stresses; material: titanium alloy; material: Ti-6Al-4V; material: Inconel 718; manufacturing process: SLM; manufacturing process: additive manufacturing