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However , low tool life due to plastic deformation and wear at elevated temperatures is limiting its application in welding of high melting point materials .
 concept or principle: tool life; machanical property: plastic deformation; concept or principle: wear; process parameter: temperatures; manufacturing process: welding; machanical property: melting point; concept or principle: materials
Please list all entity words in the text that fit the category.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} 
Answer:
 concept or principle: tool life; machanical property: plastic deformation; concept or principle: wear; process parameter: temperatures; manufacturing process: welding; machanical property: melting point; concept or principle: materials