4286
The literature shows that it is very difficult , nay impossible , to have an efficient metallurgical bond between Ti6Al4V and Inconel-Mo alloys without cracks , porosities or delamination .
 concept or principle: metallurgical bond; material: Ti6Al4V; material: alloys; machanical property: porosities; concept or principle: delamination
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: metallurgical bond, Ti6Al4V, alloys, porosities, delamination 
Answer:
 concept or principle: metallurgical bond; material: Ti6Al4V; material: alloys; machanical property: porosities; concept or principle: delamination