In-situ observation and numerical simulation on the transient strain and distortion prediction during additive manufacturing

2019 ◽  
Vol 38 ◽  
pp. 494-501 ◽  
Author(s):  
Ruishan Xie ◽  
Gaoqiang Chen ◽  
Yue Zhao ◽  
Shuai Zhang ◽  
Wentao Yan ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Additive Manufacturing ◽  
In Situ Observation ◽  
Transient Strain

Study on Solidification Cracking of Laser Dissimilar Welded Joints by using in-Situ Observation and Numerical Simulation

2010 ◽  
Vol 54 (9-10) ◽  
pp. R257-R266 ◽  
Author(s):  
Peng Wen ◽  
Motomichi Yamamoto ◽  
Yasutaka Senda ◽  
Tomoko Tamura ◽  
Kenji Shinozaki
Keyword(s):  
Numerical Simulation ◽  
Welded Joints ◽  
Solidification Cracking ◽  
In Situ Observation

The full-field strain distribution and the evolution behavior during additive manufacturing through in-situ observation

2018 ◽  
Vol 150 ◽  
pp. 49-54 ◽  
Author(s):  
Ruishan Xie ◽  
Yue Zhao ◽  
Gaoqiang Chen ◽  
Xin Lin ◽  
Shuai Zhang ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Strain Distribution ◽  
Field Strain ◽  
In Situ Observation ◽  
Full Field ◽  
Evolution Behavior

In Situ Observation of Catalyzed Gasification of Graphite by Nickel

1981 ◽  
Vol 39 ◽  
pp. 76-77
Author(s):  
R. T. K. Baker ◽  
R. D. Sherwood
Keyword(s):  
Objective Lens ◽  
In Situ Observation ◽  
Gas Flows ◽  
Catalytic Gasification ◽  
Television Camera ◽  
Viewing Screen ◽  
Fuels And Chemicals ◽  
Gasification Of Carbon ◽  
Transmission Microscope

The catalytic gasification of carbon at high temperature by microscopic size metal particles is of fundamental importance to removal of coke deposits and conversion of refractory hydrocarbons into fuels and chemicals. The reaction of metal/carbon/gas systems can be observed by controlled atmosphere electron microscopy (CAEM) in an 100 KV conventional transmission microscope. In the JEOL gas reaction stage model AGl (Fig. 1) the specimen is positioned over a hole, 200μm diameter, in a platinum heater strip, and is interposed between two apertures, 75μm diameter. The control gas flows across the specimen and exits through these apertures into the specimen chamber. The gas is further confined by two apertures, one in the condenser and one in the objective lens pole pieces, and removed by an auxiliary vacuum pump. The reaction zone is <1 mm thick and is maintained at gas pressure up to 400 Torr and temperature up to 1300<C as measured by a Pt-Pt/Rh 13% thermocouple. Reaction events are observed and recorded on videotape by using a Philips phosphor-television camera located below a hole in the center of the viewing screen. The overall resolution is greater than 2.5 nm.

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