The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
M C Mataya - One of the best experts on this subject based on the ideXlab platform.
-
effect of forging strain rate and deformation temperature on the mechanical properties of warm worked 304l stainless steel
Journal of Materials Processing Technology, 2010Co-Authors: N T Switzner, C J Van Tyne, M C MatayaAbstract:Abstract Stainless steel 304L Forgings were produced with four different types of production forging equipment – hydraulic press, mechanical press, screw press, and high-energy rate forging (HERF). Each machine imparted a different nominal strain rate during the deformation. The final Forgings were done at the warm working (low hot working) temperatures of 816 °C, 843 °C, and 871 °C. The objectives of the study were to characterize and understand the effect of industrial strain rates (i.e. processing equipment), and deformation temperature on the mechanical properties for the final component. Some of the components were produced with an anneal prior to the final forging while others were deformed without the anneal. The results indicate that lower strain rates produced lower strength and higher ductility components, but the lower strain rate processes were more sensitive to deformation temperature variation and resulted in more within-part property variation. The highest strain rate process, HERF, resulted in slightly lower yield strength due to internal heating. Lower processing temperatures increased strength, decreased ductility but decreased within-part property variation. The anneal prior to the final forging produced a decrease in strength, a small increase in ductility, and a small decrease of within-part property variation.
N T Switzner - One of the best experts on this subject based on the ideXlab platform.
-
effect of forging strain rate and deformation temperature on the mechanical properties of warm worked 304l stainless steel
Journal of Materials Processing Technology, 2010Co-Authors: N T Switzner, C J Van Tyne, M C MatayaAbstract:Abstract Stainless steel 304L Forgings were produced with four different types of production forging equipment – hydraulic press, mechanical press, screw press, and high-energy rate forging (HERF). Each machine imparted a different nominal strain rate during the deformation. The final Forgings were done at the warm working (low hot working) temperatures of 816 °C, 843 °C, and 871 °C. The objectives of the study were to characterize and understand the effect of industrial strain rates (i.e. processing equipment), and deformation temperature on the mechanical properties for the final component. Some of the components were produced with an anneal prior to the final forging while others were deformed without the anneal. The results indicate that lower strain rates produced lower strength and higher ductility components, but the lower strain rate processes were more sensitive to deformation temperature variation and resulted in more within-part property variation. The highest strain rate process, HERF, resulted in slightly lower yield strength due to internal heating. Lower processing temperatures increased strength, decreased ductility but decreased within-part property variation. The anneal prior to the final forging produced a decrease in strength, a small increase in ductility, and a small decrease of within-part property variation.
Yucel Birol - One of the best experts on this subject based on the ideXlab platform.
-
Potential of twin-belt-cast EN AW 6082 blanks for the manufacture of wishbone suspension Forgings
International Journal of Advanced Manufacturing Technology, 2017Co-Authors: Yucel Birol, Emre Gokcil, Seracettin AkdiAbstract:© 2017, Springer-Verlag London. Twin-belt-cast (TBC) strip is offered as forging stock for relatively flat, 2-dimensional Forgings such as wishbone suspension. When forged, the fragmented eutectic cells of the TBC blank and the very fine precipitates are aligned in the forging direction with a section grain structure where much of the section is predominantly fibrous. The fibrous grains of the forged component undergo recrystallization and grain growth and are finally replaced by elongated grains in the plastic flow direction during solution heat treatment. Selection of the solutionizing temperature is claimed to be critical. The yield and tensile strength, elongation and hardness all decrease steadily with increasing solutionizing temperature due to grain coarsening. However, both the static and dynamic mechanical properties of the TBC EN AW 6082 blank compare favourably with the extruded forging stock, in spite of coarse grains across the entire section of the forging. After all, both suffer from coarse grains on the surface of the forging. It is thus concluded that the TBC EN AW blanks can be used for the manufacture of relatively flat, 2-dimensional automotive parts such as wishbone suspension components.
-
effect of extrusion press exit temperature and chromium on grain structure of en aw 6082 alloy Forgings
Materials Science and Technology, 2015Co-Authors: Yucel BirolAbstract:AbstractExtruded bar is the typical forging stock in the manufacture of EN AW 6082 forged suspension components. The frictional heating and high strains introduced during extrusion leads to fine equiaxed surface grains that inevitably grow during forging owing to a very small initial grain size and a strain-free state. Higher extrusion temperatures as well as Cr addition have a favourable impact on the depth of the coarse grain zone in 6082 Forgings. The interior fibrous grains may recrystallise to produce small equiaxed grains during forging and suffer abnormal growth during the solution heat treatment. Sections with entirely coarse grains appear to be the standard after the T6 heat treatment when the 6082 alloy is Cr-free regardless of the press exit temperature of the extrusion step in the production cycle. However, coarse grains are confined to the surface regions in Forgings produced from 6082 alloy with as much as 0·13 wt-%Cr regardless of the press exit temperature. High extrusion temperatures redu...
-
effect of cast and extruded stock on grain structure of en aw 6082 alloy Forgings
Materials Science and Technology, 2014Co-Authors: Yucel Birol, O IlgazAbstract:There has been a rapid increase in the use of aluminium Forgings in the automotive industry, where weight savings is a critical requirement for reduced fuel consumption and exhaust emissions. Extruded bar is the typical forging stock particularly in the manufacture of suspension components. There has been a great interest to replace the extruded forging stock with cast billets of the same diameter. The casting and extrusion routes for the manufacture of EN AW 6082 alloy forging stock were compared in the present work. The control arm produced via forging of the cast stock offers a very uniform grain structure and much superior surface quality with respect to its counterpart produced by the forging of the extruded stock owing to a much smaller grain structure at the surface of the forged component after the T6 heat treatment.
C J Van Tyne - One of the best experts on this subject based on the ideXlab platform.
-
effect of forging strain rate and deformation temperature on the mechanical properties of warm worked 304l stainless steel
Journal of Materials Processing Technology, 2010Co-Authors: N T Switzner, C J Van Tyne, M C MatayaAbstract:Abstract Stainless steel 304L Forgings were produced with four different types of production forging equipment – hydraulic press, mechanical press, screw press, and high-energy rate forging (HERF). Each machine imparted a different nominal strain rate during the deformation. The final Forgings were done at the warm working (low hot working) temperatures of 816 °C, 843 °C, and 871 °C. The objectives of the study were to characterize and understand the effect of industrial strain rates (i.e. processing equipment), and deformation temperature on the mechanical properties for the final component. Some of the components were produced with an anneal prior to the final forging while others were deformed without the anneal. The results indicate that lower strain rates produced lower strength and higher ductility components, but the lower strain rate processes were more sensitive to deformation temperature variation and resulted in more within-part property variation. The highest strain rate process, HERF, resulted in slightly lower yield strength due to internal heating. Lower processing temperatures increased strength, decreased ductility but decreased within-part property variation. The anneal prior to the final forging produced a decrease in strength, a small increase in ductility, and a small decrease of within-part property variation.
Yu-cun Zhang - One of the best experts on this subject based on the ideXlab platform.
-
Research on the temperature field detection method of large cylinder Forgings during heat treatment process based on infrared spectra
Spectroscopy and Spectral Analysis, 2020Co-Authors: Yu-cun Zhang, Xian-bin Fu, Yan-de Qi, Shan ZhouAbstract:: In order to grasp the changes of the forging's temperature field during heat treatment, a temperature field detection method based on infrared spectra for large cylinder Forgings is proposed in the present paper. On the basis of heat transfer a temperature field model of large barrel Forgings was established by the method of separating variables. Using infrared spectroscopy the large Forgings temperature measurement system was built based on the three-level interference filter. The temperature field detection of forging was realized in its heat treatment by combining the temperature data and the Forgings temperature field detection model. Finally, this method is feasible according to the simulation experiment. The heating forging temperature detection method can provide the theoretical basis for the correct implementation of the heat treatment process.
-
online measuring method of radial section line for ring Forgings
The International Journal of Advanced Manufacturing Technology, 2019Co-Authors: Yu-cun Zhang, Xian-bin Fu, Shu Miao, Qun LiAbstract:Ring Forgings are widely used in industrial fields such as trains, construction machinery, bearings, ships, petrochemicals, power generation, aerospace, and nuclear industries. In the dynamic manufacturing process of Forgings, the online measurement of radial section line and various dimensional data plays a crucial role in controlling the dimensional accuracy and reducing the reject rate. Therefore, an online measurement method of radial section line for ring Forgings based on line laser scanning is proposed. First, a laser scanning measurement system is established for this method. The laser scanning data of the radial uppermost layer section is obtained through this system. Second, all the point cloud data is described as a topological space. The double inverse limit space of the original two-dimensional point cloud information space is established. The topological transitivity between these two spaces is studied. Third, according to the study of the topological transitivity, the relationship of the coordinate position between each point is obtained. Then, a complete radial section line of ring Forgings is formed. Finally, the radial dimension data of ring Forgings is obtained. Two groups of dimensional measurement experiments have been done. One of the experimental objects is standard ring forging, the other of the experimental objects is non-standard ring forging. The result of the experiment shows that all errors satisfy the requirement of measurement precision.
-
Online measuring method of the axial section line in ring forging process
IET Science Measurement & Technology, 2018Co-Authors: Ying Wang, Yu-cun Zhang, Yongjie Wang, Xian-bin FuAbstract:The axial section line of the ring forging is the key parameter to measure whether the ring forging process meets the technical requirements. To ensure the quality of the ring Forgings, an online measuring method of the axial section line in ring forging process is proposed in this study. First, the axial section line data of the ring forging is obtained online by laser scanning device. Then, the axial section line data is locally sorted and is screened to eliminate the edge noise. Second, the axial section line data is converted to line grey image data by merger and derivation theory. Finally, the line grey image data is smoothed by bilateral filtering based on information entropy selection factor. Then, the shape of the axial section line is constructed to complete the measurement of the axial section line. The experimental results show that the measurement speed of axial section line meets the requirements and the measurement accuracy of the axial section line meets the requirements.