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The AM specimens showed significantly higher crack propagation speed , yield strength , ultimate tensile strength , strain hardening coefficient , and yet lower ductility compared to the cast specimens under dynamic tension .
 AM, crack propagation, yield strength, ultimate tensile strength, strain hardening, ductility, cast, dynamic
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:
 AM, crack propagation, yield strength, ultimate tensile strength, strain hardening, ductility, cast, dynamic