2017 | AFC ACCOMPLISHMENTS 92 Figure 1. Setup for axial tensile testing of tubular geometry SiC/ SiC composite test article at Oak Ridge National Laboratory. Arms from extensometer and transducers for acoustic emission detection are attached to the test specimen. Silicon carbide (SiC) continuous fiber-reinforced SiC-matrix composites (SiC/SiC compos- ites) are promising candidate mate- rials for enhanced accident-tolerance fuel cladding. American Society for Testing and Materials (ASTM) test standards are required for evaluating the properties of SiC/SiC composite tubes representative of fuel cladding. Thus, ASTM standards are neces- sary for assessing and certifying the adequacy of SiC/SiC composite material for cladding application. Moreover, in order to establish the failure probability of SiC/SiC clad- ding, it is essential to understand the statistical distribution of mechanical properties of SiC/SiC composite tubes of cladding-relevant architec- ture.The present work was intended to 1) determine statistics, 2) establish the precision and bias statements for the ASTM C-1773 test standard and 3) help establish database for the axial tensile properties of SiC/SiC composite tubes. ASTM Round-Robin Testing for SiC/SiC Cladding Tube Strength Principal Investigator: Dr.Yutai Katoh (ORNL) Collaborators: Dr. Gyanender Singh (ORNL), Dr. Edgar Lara-Curzio (ORNL), Dr. Christian Deck (General Atomics), Dr. Stephen Gonczy (Gateway Materials Technology, Inc.)