A5101779743- Microstructure and Mechanical Properties of Steels
- High Temperature Alloys and Creep
- Metal Alloys Wear and Properties
- Welding Techniques and Residual Stresses
- Metallurgy and Material Forming
- Metallurgical Processes and Thermodynamics
- Solidification and crystal growth phenomena
- Intermetallics and Advanced Alloy Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced Materials Characterization Techniques
- Fatigue and fracture mechanics
- Energy, Environment, Economic Growth
- Climate Change Policy and Economics
- High Entropy Alloys Studies
- Additive Manufacturing Materials and Processes
- Magnetic confinement fusion research
- Nuclear Materials and Properties
- Fusion materials and technologies
- Environmental Impact and Sustainability
- High-Temperature Coating Behaviors
Tianjin University of Technology and Education
2019-2024
Chinese Academy of Sciences
2008-2019
Institute of Urban Environment
2019
Institute of Plasma Physics
2017
National Institute for Materials Science
2011-2013
Tungsten erosion and re-deposition at the upper outer divertor of Experimental Advanced Superconducting Tokamak has been modelled using 3D Monte Carlo code ERO. The measured plasma condition in attached L mode discharges with single null configuration used to build background simulations. tungsten gross rate is mainly determined by carbon impurity plasma. Increasing concentration can first increase afterwards suppress rate. Taking into account material mixing surface model, influence eroded...
The solidification process of Ni-based superalloy K465 was examined using DTA and X-ray diffraction. impact melt structure on the morphology MC carbide γ′-phase analyzed. It observed that an increase in peak temperature led to a significant decrease precipitation for carbides, but only slight formation matrix eutectic microstructure. diffraction results showed some ordered structures were detected sample with 1450 °C 1500 °C, not 1360 °C. Furthermore, displayed similar crystalline features...
The morphology of MC carbide has been observed to vary with melt heat treatment (MHT) temperature in K465 nickel-based superalloy, which had remelted a DTA instrument. transforms from block-type script-type when the MHT increases 1360 °C 1400 °C, and size colonies are reduced further increased 1450 °C. A liquid metal X-ray diffractometer was utilized detect variation structure induced by increasing temperature. And exothermic curves were recorded instrument identify solidification process...
As environmental temperature decreases, the amount of retained austenite is more likely to greatly reduce due thermal austenite–martensite transformation caused by decreased stability austenite, probably making its lower than required content. In present study, in Cr–Ni weld metals was investigated see whether sufficient can be maintained at low temperatures. The specific experimental procedure as follows: briefly, samples were cooled turn from room 0, −20, −40, −60, −80, −100 and −196°C;...
Low-carbon development is an essential measure to combat climate change, and the establishment of low-carbon standards important means achieve development. Due differences in size level among counties China, applicability fairness county-level are very this country. This study analyzed trends carbon emissions defined peak value per capita, summarized characteristics existing standards, proposed a fair standard based on capita. The results our analysis suggest that, under constraints...
Interrupted creep tests were performed on a polycrystalline Ni-base superalloy, and rejuvenation heat treatment (RHT) was carried out to restore the resistance. During deformation, microstructural evolution can be characterized as coarsening rafting of γ′ precipitates, formation dislocation networks in matrix channels, shearing by dislocations carbides transformation from MC M6C type. In sample with low precrept strain, effectively removed after RHT size morphology particles similar that...
Retained austenite affects the low-temperature tensile properties of Fe-14Cr-(4∼9)Ni weld metal through strain-induced martensite transformation. The strengthening process caused by transformation is evaluated in terms work-hardening-rate. By means this result, effect retained on elongation interpreted. Strength-ductility balance found to be strongly influenced at low temperature.
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The mechanical stability of retained austenite in a Cr-Ni weld metal welded joint under service load is related to the initial amount and type joint. used over-matching type, i.e., tensile strength higher than that base metal. For this joint, when less 7.5%, stable enough remain over whole tension process. However, 12–27%, metastable, large it has transformed into martensite at applied stress level 0.2% proof stress. At level, 12% still present. As strain further increases, continues...
980 MPa grade Cr-Ni weld metal with martensite and retained austenite was produced by single-pass GMAW. Its impact behavior evaluated using the Charpy test. It found that (1) strain-induced transformation from enhances absorbed energy at various temperatures contents of oxygen in metal; (2) increasing content reduces energy; (3) 233K, can change fracture mode extremely low brittle to ductile, but it has no such effect higher levels. Oxide promotes ductile fracture. An increase lowers vTrs.
Abstract Laser cladding coating is the focus of development in field die repair. It has characteristics uniform and compact coating, good bonding strength, little thermal impact on substrate, easy to realize automation. FeCr alloy was prepared 738H steel by laser process. Based MSC Marc finite element software life-and-death method, numerical analysis model repair establelished, temperature field, stress deformation under different process parameters were solved. According simulation...