Effects of strain rate and deformation heating in tensile testing

1978 ◽  
Vol 9 (7) ◽  
pp. 979-986 ◽  
Author(s):  
A. S. Korhonen ◽  
H. J. Kleemola
Keyword(s):  
Strain Rate ◽  
Tensile Testing ◽  
Deformation Heating

scholarly journals Specimen Inertia in high strain rate tensile testing

2015 ◽  
Vol 94 ◽  
pp. 01050 ◽  
Author(s):  
Meyrick Hockly ◽  
Clive R. Siviour
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Tensile Testing ◽  
High Strain

scholarly journals On the suitability of slow strain rate tensile testing for assessing hydrogen embrittlement susceptibility

2020 ◽  
Vol 163 ◽  
pp. 108291 ◽  
Author(s):  
Emilio Martínez-Pañeda ◽  
Zachary D. Harris ◽  
Sandra Fuentes-Alonso ◽  
John R. Scully ◽  
James T. Burns
Keyword(s):  
Hydrogen Embrittlement ◽  
Strain Rate ◽  
Tensile Testing ◽  
Slow Strain Rate

Influence of plastic deformation temperature on the structure and mechanical properties of low-alloy copper alloys with Co, Ni and B

2017 ◽  
Vol 84 (2) ◽  
pp. 49-57 ◽  
Author(s):  
B. Grzegorczyk ◽  
W. Ozgowicz
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Strain Rate ◽  
Minimum Temperature ◽  
Deformation Temperature ◽  
Tensile Testing ◽  
Copper Alloys ◽  
Testing Machine ◽  
Temperature Range ◽  
Ductility Minimum

Purpose: This work presents the influence of chemical composition and plastic deformation temperature of CuCoNi and CuCoNiB as well as CuCo2 and CuCo2B alloys on the structure, mechanical properties and, especially on the inter-crystalline brittleness phenomenon and ductility minimum temperature effect in tensile testing with strain rate of 1.2·10-3 s-1 in the range from 20°C to 800°C. Design/methodology/approach: The tensile test of the investigated copper alloys was realized in the temperature range of 20-800°C with a strain rate of 1.2·10-3 s–1 on the universal testing machine. Metallographic observations of the structure were carried out on a light microscope and the fractographic investigation of fracture on an electron scanning microscope. Findings: Low-alloy copper alloys such as CuCo2 and CuCo2B as well as CuCoNi and CuCoNiB show a phenomenon of minimum plasticity at tensile testing in plastic deforming temperature respectively from 500°C to 700°C for CuCo2, from 450°C to 600°C for CuCo2B and from 450°C to 600°C for CuCo2B and from 500°C to 600°C for CuCoNiB. Practical implications: In result of tensile tests of copper alloys it has been found that the ductility minimum temperature of the alloys equals to about 500°C. At the temperature of stretching of about 450°C the investigated copper alloys show maximum strength values. Originality/value: Based on the test results the temperature range for decreased plasticity of CuCoNi and CuCoNiB as well as CuCo2 and CuCo2B alloys was specified. This brittleness is a result of decreasing plasticity in a determined range of temperatures of deforming called the ductility minimum temperature.

3rd Generation AHSS High Strain Rate Tensile Testing

2017 ◽  
Author(s):  
S. Kuhlman ◽  
C. Parsons ◽  
T. Machrowicz ◽  
A. Sergueeva ◽  
A. Frerichs ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Tensile Testing ◽  
High Strain

An Investigation of Cavitation in the Tensile Testing of a Spray-Cast Aluminum Alloy Processed by ECAP

2006 ◽  
Vol 503-504 ◽  
pp. 83-90 ◽  
Author(s):  
Megumi Kawasaki ◽  
Cheng Xu ◽  
Terence G. Langdon
Keyword(s):  
Grain Size ◽  
Aluminum Alloy ◽  
Strain Rate ◽  
Tensile Testing ◽  
Ultrafine Grain ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Angular Pressing ◽  
Cavity Development ◽  
Spray Casting

A commercial aluminum 7034 alloy, produced by spray casting and having an initial grain size of ~2.1 μm, was subjected to equal-channel angular pressing (ECAP) through six passes at 473 K. In the as-pressed condition, the microstructure was reasonably homogeneous and the grain size was reduced to an ultrafine grain size of ~0.3 μm. This alloy contains MgZn2 and Al3Zr precipitates which restrict grain growth. In tensile testing at 673 K after processing by ECAP, an elongation of >1000% was achieved at a strain rate of 1.0 × 10-2 s-1 corresponding to high strain rate superplasticity. Quantitative cavity measurements were conducted on the specimens after tensile testing for both the as-received condition and after ECAP. These measurements reveal a significant number of small cavities in the samples and especially in the sample that exhibited a very high elongation. This paper describes the morphology of cavity development in the spray-cast aluminum alloy in both the as-received and as-pressed condition.

Deformation Heating and Its Effect on the Processing Maps of Ti-15-3 Titanium Alloy

2013 ◽  
Vol 712-715 ◽  
pp. 58-64
Author(s):  
Jing Qi Zhang ◽  
Hong Shuang Di ◽  
Xiao Yu Wang
Keyword(s):  
Titanium Alloy ◽  
Strain Rate ◽  
Rate Sensitivity ◽  
Strain Rate Range ◽  
Processing Maps ◽  
Compression Tests ◽  
Temperature Range ◽  
Deformation Heating ◽  
Instability Criteria ◽  
Flow Stress Data

In the present study, deformation heating generated by plastic deformation and its effect on the processing maps of Ti-15-3 titanium alloy were investigated. For this purpose, hot compression tests were performed on a Gleeble-3800 thermo-mechanical simulator in the temperature range of 850-1150 °C and strain rate range of 0.001-10 s1. The temperature rise due to deformation heating was calculated and the as-measured flow curves were corrected for deformation heating. Using the as-measured and corrected flow stress data, the processing maps for Ti-15-3 titanium alloy at a strain of 0.5 were developed on the basis Murty‘s and Babu’s instability criteria. The results show that both the instability maps based the two instability criteria are essentially similar and are characterized by an unstable region occurring at strain rates higher than 0.1 s1for almost the entire temperature range tested. The unstable regions are overestimated from the as-measured data due to the effect of deformation heating, indicating a better workability after correcting the effect of deformation heating. This is further conformed by the analysis based on strain rate sensitivity.

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