JULY 2021 VOLUME 79 • NUMBER 7 J U L Y 2 0 2 1 • M A T E R I A L S E V A L U A T I O N 653 Digital Extras This icon indicates that enhanced content is available on the digital edition of Materials Evaluation. FEATURES 678 Automated Robotic Systems for Nondestructive Testing of Aerospace Composite Structures Barry A. Fetzer 687 Aerial Robots for Contact-Based Ultrasonic Thickness Measurements for Field Inspections Robert (Bob) Dahlstrom 728 TECHNICAL PAPERS 715 Integrating Electromagnetic Acoustic Transducers in a Modular Robotic Gripper for Inspecting Tubular Components Hamidreza Nemati, Fernando Alvidrez, Ankit Das, Nihar Masurkar, Manoj Rudraboina, Hamid Marvi, and Ehsan Dehghan-Niri 728 Development of an Innovative Inspection Tool for Superheater Tubes in Fossil Fuel Power Plants Caique Lara, Julie Villamil, Anthony Abrahao, Aparna Aravelli, Guilherme Daldegan, Sharif Sarker, Daniel Martinez, and Dwayne McDaniel 739 AI-Enabled Robotic NDE for Structural Damage Assessment and Repair Xiaodong Shi, Anthony Olvera, Ciaron Hamilton, Erzhuo Gao, Jiaoyang Li, Lucas Utke, Andrew Petruska, Zhenzhen Yu, Lalita Udpa, Yiming Deng, and Hao Zhang 678 TECH FOCUS ISSUE: ROBOTIC INSPECTION 663 Focus Letter “We can be inspired by nature to develop advanced robotic inspection platforms.” Crack 715