scholarly journals Fatigue Limit Evaluation of AZ31B Magnesium Alloy Based on Temperature Distribution Analysis

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1331
Author(s):  
Shaofei Guo ◽  
Xuesong Liu ◽  
Hongxia Zhang ◽  
Zhifeng Yan ◽  
Hongyuan Fang
Keyword(s):  
Temperature Distribution ◽  
Magnesium Alloy ◽  
Fatigue Limit ◽  
Infrared Camera ◽  
Processing Method ◽  
Distribution Analysis ◽  
Az31b Magnesium Alloy ◽  
Thermal Indicator ◽  
Data Processing Method ◽  
Thermal Indicators

In this paper, the fatigue limit of AZ31B magnesium alloy is evaluated according to the surface temperature of the specimen during the test. Considering the influence of external heating, a special data-processing method is used to filter the raw temperature data obtained by the infrared camera. A thermal indicator based on the analysis of superficial temperature distribution is described and proposed. In contrast, most existing thermal indicators are calculated based on temperature evolution. Three existing algorithms were used to evaluate the fatigue limit of AZ31B magnesium alloy based on the newly proposed thermal indicator. In addition, the results of the test were used to compare with the results of traditional methods. It has been proved that the fatigue limit of AZ31B magnesium alloy can be assessed by using the new thermal indicator based on temperature distribution.

scholarly journals Thermographic Study of AZ31B Magnesium Alloy under Cyclic Loading: Temperature Evolution Analysis and Fatigue Limit Estimation

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5209
Author(s):  
Shaofei Guo ◽  
Xuesong Liu ◽  
Hongxia Zhang ◽  
Zhifeng Yan ◽  
Zhongdian Zhang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Fatigue Limit ◽  
Cyclic Hardening ◽  
Processing Method ◽  
Temperature Data ◽  
Temperature Evolution ◽  
Az31b Magnesium Alloy ◽  
Evolution Analysis ◽  
Data Processing Method ◽  
Thermographic Study

In this paper, infrared thermography was employed to study the fatigue process of AZ31B magnesium alloy. In order to eliminate the interference caused by the temperature rise of the fixture, a data processing method was proposed, which is based on a special model to describe the temperature change of the specimen. Based on the temperature data after processing, the temperature evolution indicates that AZ31B magnesium alloy has undergone cyclic hardening during fatigue. Three different temperature indicators were selected to evaluate the fatigue limit based on the evolution curve after processing. In addition, the experimental results showed that the temperature data processed by the proposed method can be used to estimate the fatigue limit of AZ31B magnesium alloy. Experiments were performed for both extrusion and transverse directions in consideration of the anisotropy of the AZ31B.

Rapid evaluation of fatigue limit in AZ31B magnesium alloy using acoustic emission

2018 ◽  
Vol 34 (12) ◽  
pp. 1480-1488
Author(s):  
Chenghao Li ◽  
Zhifeng Yan ◽  
Peng Dong ◽  
Yinghu Su ◽  
Xiaojiao Wang ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Magnesium Alloy ◽  
Fatigue Limit ◽  
Rapid Evaluation ◽  
Az31b Magnesium Alloy

scholarly journals Evaluation of Mammary Cancer in 7,12-Dimethylbenz(a)anthracene-Induced Wister Rats by Asymmetrical Temperature Distribution Analysis Using Thermography: A Comparison with Serum CEA Levels and Histopathology

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
S. P. Angeline Kirubha ◽  
M. Anburajan ◽  
B. Venkataraman ◽  
R. Akila ◽  
D. Sharath ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Temperature Difference ◽  
Mammary Cancer ◽  
Early Stage ◽  
Tumor Development ◽  
Infrared Camera ◽  
Flank Region ◽  
Distribution Analysis ◽  
Significant Difference ◽  
Region Temperature

Animal surface temperature profile captured using infrared camera is helpful for the assessment of physiological responses associated with the regulation of body temperature. Diagnosing breast cancer in early stage itself has a greater effect on the prognosis. In this work, asymmetrical temperature distribution analysis of chemical carcinogen 7,12-dimethyl benz(a)anthracene-induced in the lower right flank region of Wistar rats (n=6) was carried out to test the potential of thermography in diagnosing mammary cancer and tumor growth over a period of nine weeks in comparison with histopathology results as standard. Temperature difference between the tumor induced lower right and left side of flank region was significant (withPvalue<0.001), whereas in the abdomen and shoulder there was no significant difference in temperature between right and left sides. Percentage of asymmetrical temperature difference in the tumor induced lower flank region was 0.5 to 2%, whereas in the other regions it was<0.5%. Green pixel distribution in RGB color histogram was asymmetrical in the tumor induced lower flank region. Temperature reduction was observed in the tumor induced region after the seventh day of carcinogen induction. Asymmetrical thermogram analysis is the best method of diagnosing mammary cancer and for studying tumor development.

scholarly journals Fatigue Performance Evaluation of AZ31B Magnesium Alloy Based on Statistical Analysis of Self-Heating

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2251
Author(s):  
Shaofei Guo ◽  
Xuesong Liu ◽  
Hongxia Zhang ◽  
Zhifeng Yan ◽  
Hongyuan Fang
Keyword(s):  
Statistical Analysis ◽  
Magnesium Alloy ◽  
Fatigue Limit ◽  
Extrusion Direction ◽  
Assessment Method ◽  
The Self ◽  
Load Curve ◽  
Az31b Magnesium Alloy ◽  
Self Heating ◽  
Heating Behavior

AZ31B magnesium alloy is the experimental material in this study. Considering its anisotropy, fatigue assessment based on self-heating is carried out for both the extrusion direction and the transverse direction. The self-heating behavior in the two orientations is compared. Similar to steels, an obvious inflection point that corresponds to the fatigue limit can be found in the self-heating vs. load curve for AZ31B. A new fatigue limit assessment method is proposed based on a statistical analysis of self-heating data. This method can provide a satisfactory assessment of the fatigue limit for AZ31B in the both orientations.

INVESTIGATION OF MECHANICAL PROPERTIES BY OPTIMIZING PROCESS PARAMETERS OF FSW FOR AZ31B MAGNESIUM ALLOY

2019 ◽  
Vol 14 (4) ◽  
pp. 22
Author(s):  
RANA GOPAL ◽  
GULATI PIYUSH ◽  
S. S. BANWAIT ◽  
◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Process Parameters ◽  
Az31b Magnesium Alloy

Effects of the welding current on the mechanical and metallurgical properties of a magnetic oscillated arc welded AZ31B magnesium alloy

2020 ◽  
Vol 62 (8) ◽  
pp. 863-868
Author(s):  
Subravel Visvalingam ◽  
Prabu Sigamani
Keyword(s):  
Magnesium Alloy ◽  
Welding Current ◽  
Az31b Magnesium Alloy ◽  
Metallurgical Properties

PENGARUH ETIKA PEGAWAI, PELAYANAN PUBLIK DAN REFORMASI BIROKRASI TERHADAP PENERAPAN ZONA INTEGRITAS PADA LAPAS MAKASSAR

2020 ◽  
Vol 2 (1) ◽  
pp. 13-15
Author(s):  
Adi Sucipto ◽  
Hasanuddin Remmang ◽  
Haeruddin Saleh
Keyword(s):  
Regression Analysis ◽  
Data Processing ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Random Sampling ◽  
Public Services ◽  
Simple Random Sampling ◽  
Processing Method ◽  
Data Processing Method

Penelitian ini bertujuan menguji pengaruh Etika Pegawai, Pelayanan Publik dan Reformasi Birokrasi terhadap Penerapan Zona Integritas. Pengaruh Etika Pegawai, Pelayanan Publik dan Reformasi Birokrasi terhadap Penerapan Zona Integritas pada Lembaga Pemasyarakatan Kelas I Makassar Responden dalam penelitian ini adalah Pengunjung dan keluarga nara-pidana Lembaga Pemasyarakatan Kelas I Makassar. Jumlah pengunjung yang menjadi sampel penelitian ini adalah 55 orang. Metode penentuan sampel yang digunakan dalam penelitian ini adalah Simple Random Sampling, sedangkan metode pengolahan data yang digunakan peneliti adalah analisis regresi berganda. Hasil penelitian ini menunjukkan bahwa Etika Pegawai dan Pelayanan Publik berpengaruh signifikan terhadap Penerapan Zona Integritas di Lembaga Pemasyarakatan Kelas I Makassar.     This study examines the effect of employee ethics and the improvement of public services on the implementation of the integrity zone. The effect of employee ethics, and improvement of public services on the implementation of integrity zone on Lembaga Pemasyarakatan Kelas 1 Makassar. Respondents in this study were Makassar class in penitentiary visitors. the number of visitors who sampled this study was 55 people. the method of determining the sample used in this study is simple random sampling, while the data processing method used by researchers is multiple regression analysis. the results of this study indicate that employee ethics and public services have a significant effect on the implementation of the integrity zone in Makassar class in penitentiary.

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