Application of a Tensile Test Method for the Evaluation of Unraveling State of Fibrous Filler in Powder-Fiber Mixtures.

A brief overview is given in the conventional domed bursting disc structure and manufacturing method. 316L stainless steel as a template is selected. With the investigation on bursting disc material tensile test method, the test results are summarized,also the burst results of disc burst pressure in different sizes. With the help of bursting disc material performance test and bursting disc burst pressure test of 316L , the test results provide a reference for other types of bursting disc.

Download Full-text

Development of Tensile Test Method for High-density Coal under Carbonization

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.84.5_321 ◽

1998 ◽

Vol 84 (5) ◽

pp. 321-326 ◽

Cited By ~ 3

Author(s):

Akira SUZUKI ◽

Makoto UEKI ◽

Hideyuki AOKI ◽

Takatoshi MIURA ◽

Kenji KATO ◽

...

Keyword(s):

Tensile Test ◽

High Density ◽

Test Method

Download Full-text

A Comparative Study of the CMT+P Process on 316L Stainless Steel Additive Manufacturing

Applied Sciences ◽

10.3390/app10093284 ◽

2020 ◽

Vol 10 (9) ◽

pp. 3284 ◽

Cited By ~ 1

Author(s):

Bin Xie ◽

Jiaxiang Xue ◽

Xianghui Ren ◽

Wei Wu ◽

Zhuangbin Lin

Keyword(s):

Tensile Strength ◽

Stainless Steel ◽

Additive Manufacturing ◽

Tensile Test ◽

Heat Dissipation ◽

316L Stainless Steel ◽

Single Channel ◽

Steel Wire ◽

Energy Dispersive Spectrometer ◽

Test Method

Adopting the cold metal transfer plus pulse (CMT + P) process, 316L stainless steel wire was treated with a single channel multi-layer deposition experiment under different linear energy. The microstructures of different regions on the deposited samples were observed by optical microscope and scanning electron microscope, and the element distribution in the structure was analyzed by energy dispersive spectrometer. The mechanical properties and microhardness were measured by tensile test method and microhardness tester, respectively, and the anisotropy of tensile strength in horizontal and vertical directions were calculated. Finally, the fracture morphology of the tensile samples were observed by SEM. Experiment results showed that when the difference between the actual and the optimal wire feeding speed matching the specific welding speed was too large, this led to an unstable deposition process as well as flow and collapse of weld bead metal, thus seriously deteriorating the appearance of the deposition samples. The results from metallographic micrograph showed that rapid heat dissipation of the substrate caused small grains to generate in the bottom region of deposition samples, then gradually grew up to coarse dendrites along the building direction in the middle and top region caused by the continuous heat accumulation during deposition. Tensile test results showed that with the increase of linear energy, the horizontal and vertical tensile strength of the as-deposited samples decreased. In addition, the higher linear energy would deteriorate the microstructure of as-deposited parts, including significantly increasing the tendency of oxidation and material stripping. The microhardness values of the bottom, middle and top regions of the samples fluctuated along the centerline of the cross-section, and the values showed a trend of decreasing first and then rising along the building direction. Meanwhile, the yield strength and tensile strength of each specimen showed obvious anisotropy due to unique grain growth morphology. On the whole, the results from this study prove that CMT+P process is a feasible MIG welding additive manufacturing method for 316L stainless steel.

Download Full-text

Evaluation of the Scott bond test method

Nordic Pulp & Paper Research Journal ◽

10.3183/npprj-2012-27-02-p231-236 ◽

2012 ◽

Vol 27 (2) ◽

pp. 231-236 ◽

Cited By ~ 7

Author(s):

Christer Fellers ◽

Sören Östlund ◽

Petri Mäkelä

Keyword(s):

Tensile Test ◽

Total Energy ◽

High Speed ◽

Test Methods ◽

Test Method ◽

The Other ◽

High Speed Photography ◽

Tensile Tester ◽

Delamination Resistance ◽

Energy Consuming

Abstract The Scott bond test is the most commonly used test method for quantifying the delamination resistance of paper and board. The objective of this investigation was to validate the hypothesis that the Scott bond value would be dominated by the total energy under the force elongation curve in a z-directional tensile test. The investigation comprised three types of hand sheets with comparatively low strength values. Three test methods were used to obtain the energy for delamination: 1) Z-test, a z-directional tensile test, 2) Scott bond test, and 3) Simulated Scott bond test, a Scott bond type of test performed in a hydraulic tensile tester. The test data were expressed as a correlation between the failure energy obtained from the Z-test and the other two tests. The results showed that the Scott bond test gave slightly higher values than the Z-test for the weakest paper, but that the value tended to be much higher for the stronger papers. On the other hand the Simulated Scott bond test tended to give lower values than the Z-test. High speed photography was used to reveal several energy consuming mechanisms in the Scott bond test that can explain why this test gave higher values than the Ztest. The lower values from the Simulated Scott bond values are more difficult to explain. At this stage we can suggest that the failure mechanism is different if the paper is delaminated by pure tension or by a gradual delamination as in the Scott bond test.

Download Full-text