Microstructure and mechanical properties of a novel high-density steel having high tungsten content

2021 ◽  
pp. 141797
Author(s):  
Anjin Liu ◽  
Lin Wang ◽  
Lei Pan ◽  
Xingwang Cheng
Keyword(s):  
Mechanical Properties ◽  
High Density ◽  
Tungsten Content ◽  
Microstructure And Mechanical Properties ◽  
High Tungsten Content

scholarly journals Microstructure and Mechanical Properties of the Butt Joint in High Density Polyethylene Pipe

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Pashupati Pokharel ◽  
Yoonsang Kim ◽  
Sunwoong Choi
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
High Density Polyethylene ◽  
Weld Zone ◽  
Butt Joint ◽  
High Density ◽  
Cooling Time ◽  
Tensile Fracture ◽  
Microstructure And Mechanical Properties ◽  
Dog Bone

The microstructure and mechanical properties of the butt joint in high density polyethylene (HDPE) pipes were evaluated by preparing the joints with increasing the cooling time from 10 s to 70 s before pressure created for fusion of the pipes. Here, cold fusion flaws in HDPE butt joint were created with increasing the cooling time around 70 s caused by the close molecular contact followed by insufficient interdiffusion of chain segments back and forth across the wetted interface. The tensile failure mechanism of the welded pipes at different fusion time was projected based on the tensile test of dog-bone shaped, fully notched bar type as well as round U-notched specimens. The mechanical properties of the joints at different fusion time were correlated with the corresponding fracture surface morphology. The weld seam as well as tensile fracture surfaces were etched using strong oxidizing agents. The crystallinity of surface etched weld zone by potassium permanganate based etchant was found higher than unetched sample due to the higher susceptibility of amorphous phase of polyethylene with oxidizing agent. The U-notched tensile test of butt welded HDPE pipe and surface etching of the weldments provided clear delineation about the joint quality.

Effect of High Density Electropulsing Current on Microstructure and Mechanical Properties of Fe-6.5wt.%Si Alloy Sheet

2017 ◽  
Vol 898 ◽  
pp. 1236-1241 ◽  
Author(s):  
Y.Y. Liu ◽  
Y.F. Liang ◽  
S.B. Wen ◽  
Feng Ye ◽  
J.P. Lin
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Rolling Process ◽  
High Energy ◽  
Alloy Sheet ◽  
High Density ◽  
Rolled Sheet ◽  
Microstructure And Mechanical Properties ◽  
Conventional Heat Treatment ◽  
Hot Rolled

Fe-6.5wt.%Si alloy is an excellent soft magnetic material. Due to the appearance of ordering structures, the alloy shows poor ambient temperature ductility, and can only be cold rolled by specific rolling process. The rolling process with heat treatment is complex and time consuming. Meanwhile, high-energy electropulsing shows electroplastic effect. Heat treatment effect of the high-density electropulsing on microstructure and mechanical properties were investigated. The hot rolled sheet with 1 mm in thickness could be uniformly recrystallized in 33 s at 690 oC by appropriate high density pulses and the ductility was improved in comparison to the conventional heat treatment in a furnace. After the electropulsing treatment, the hot rolled sheet could be warm rolled by 50% reduction of the thickness after one pass without edge crack.

Sign in / Sign up

Export Citation Format

Share Document