This is the proceedings of the selected papers presented at chinese materials congress 2015 (CMC2015) held in guiyang, china, july 10-14, 2015.This is the volume for part 4 including 154 papers selected from 4 symposia of w. Advanced preparation and processing of materials; x. Application of advanced characterization methods in materials science; y. Materials evaluation and service security; z. Materials simulation, calculation and design
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