2005
- Residual stress can not directly be seen in microCT images but can be seen indirectly in the form of warping and cracks .
 machanical property: Residual stress; material: be; process characterization: microCT; concept or principle: images; material: be; concept or principle: warping
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:
 machanical property: Residual stress; material: be; process characterization: microCT; concept or principle: images; material: be; concept or principle: warping