Wei Zhang R&D Associate Contact ZHANGW4@ORNL.GOV All Publications Modeling-Based Design and Optimization of a Gradient Composite Transition Joint Assessment of a Grade 91 Steel Forging and Seamless Pipe Section After 141,000-Hours of Operation in a Superheat Outlet Header An Engineering Approach for Weld Creep Lifetime Assessment Based on Local Property Measurement Identifying multiple synergistic factors on the susceptibility to stress relaxation cracking in variously heat-treated weldments Microstructure and Creep Performance of Wire Arc Additive Manufactured Grade 91 Steel... Machine Learning for Joint Quality Control A New Perspective of Post-Weld Baking Effect on Al-Steel Resistance Spot Weld Properties through Machine Learning and Finite Element Modeling Remaining lifetime assessment of 141,000-hour service-aged forge 91-pipe 91 steel header welds with novel in-situ digital image correlation Microstructure and creep strength of simulated intercritical heat-affected zone of grade 91 steel Metallurgical Characterization of a 141,000-hour Service-Aged Forge 91-Pipe 91 Steel Header Weldment Residual Stress Modeling and Advanced Diffraction Measurements of 347H Steel Weldments... Residual stress modeling and advanced diffraction measurements of 347H steel weldments Characteristics of Premature Creep Failure in Over-tempered Base Metal of Grade 91 Steel Weldment Clarification of creep deformation mechanism in heat-affected zone of 9Cr steels with In Situ experiments Experimental Evaluation of Localized Creep Deformation in Grade 91 Steel Weldments... Microstructure and Mechanical Properties of Intercritically Treated Grade 91 Steel Triaxial constraint and tensile strength enhancement in brazed joints Type IV failure in weldment of creep resistant ferritic alloys: I. Micromechanical origin of creep strain localization in the heat affected zone Type IV failure in weldment of creep resistant ferritic alloys: II. Creep fracture and lifetime prediction... Effect of Pre-Weld Heat Treatment on Microstructure and Creep Strength of ICHAZ in Grade 91 Steel Indentation Schmid factor and incipient plasticity by nanoindentation pop-in tests in hexagonal close-packed single crystals ... Organizations Physical Sciences Directorate Materials Science and Technology Division Materials Structure and Processing Science Section Materials Joining Group