ISSN 0794-4756
 

Original Research 


LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS

Kamilu Adeyemi BELLO, Umma ABDULLAHI, Adetayo Abdulmumin ADEBISI, Rayyan Mamuda DODO, Zahraddeen MUSA, Mohammed U SULEIMAN, Shakiru Adekunle ADELEKE , Meeme Collins IORFA.

Abstract
In this study, tempering temperature influence on low-temperature impact toughness of carbon steels was investigated. Two sets of steel samples were machined to standard Charpy V-notched impact test dimension. The first and second sets were heated to an austenitizing temperature of 800C and 900C respectively for 1 hour and then water quenched. All the as-quenched specimens in each set were further tempered at 200, 300, 400 and 500 degrees Celsius for 1 hour and then air cooled. Next, impact test was carried out on the tempered samples in the temperature range of -30C, -20C, -10C, 0C, 10C using liquid nitrogen and also at room temperature (25C). The result indicated that all the samples austenitized at 800C and 900C and then tempered in the temperature range of 200C-500C revealed a general decrease in impact energy with the reduction in test temperature. Further, it was observed that the specimens austenitized at 800C and tempered at 200C have higher impact toughness values at all the testing temperatures when compared to the samples austenitized at 900C. Both samples austenitized at 800C and 900C and then tempered at 300C demonstrated linear decrease in impact energy with reduction in temperature due to temper embrittlement phenomenon. It is therefore clear that tempering temperature applied in this investigation has significant influence on the impact energy of low carbon steel under low-temperature conditions.

Key words: tempering, low-temperature impact toughness, low carbon steel


 
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How to Cite this Article
Pubmed Style

BELLO KA, ABDULLAHI U, ADEBISI AA, DODO RM, MUSA Z, SULEIMAN MU, SAA, IORFA MC, . LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. NJE. 2020; 27(2): 5-8.


Web Style

BELLO KA, ABDULLAHI U, ADEBISI AA, DODO RM, MUSA Z, SULEIMAN MU, SAA, IORFA MC, . LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. http://www.njeabu.com.ng/?mno=21577 [Access: October 20, 2020].


AMA (American Medical Association) Style

BELLO KA, ABDULLAHI U, ADEBISI AA, DODO RM, MUSA Z, SULEIMAN MU, SAA, IORFA MC, . LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. NJE. 2020; 27(2): 5-8.



Vancouver/ICMJE Style

BELLO KA, ABDULLAHI U, ADEBISI AA, DODO RM, MUSA Z, SULEIMAN MU, SAA, IORFA MC, . LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. NJE. (2020), [cited October 20, 2020]; 27(2): 5-8.



Harvard Style

BELLO, K. A., ABDULLAHI, U., ADEBISI, A. A., DODO, R. M., MUSA, Z., SULEIMAN, M. U., , S. A. A., IORFA, M. C. & (2020) LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. NJE, 27 (2), 5-8.



Turabian Style

BELLO, Kamilu Adeyemi, Umma ABDULLAHI, Adetayo Abdulmumin ADEBISI, Rayyan Mamuda DODO, Zahraddeen MUSA, Mohammed U SULEIMAN, Shakiru Adekunle ADELEKE, Meeme Collins IORFA, and . 2020. LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. Nigerian Journal of Engineering, 27 (2), 5-8.



Chicago Style

BELLO, Kamilu Adeyemi, Umma ABDULLAHI, Adetayo Abdulmumin ADEBISI, Rayyan Mamuda DODO, Zahraddeen MUSA, Mohammed U SULEIMAN, Shakiru Adekunle ADELEKE, Meeme Collins IORFA, and . "LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS." Nigerian Journal of Engineering 27 (2020), 5-8.



MLA (The Modern Language Association) Style

BELLO, Kamilu Adeyemi, Umma ABDULLAHI, Adetayo Abdulmumin ADEBISI, Rayyan Mamuda DODO, Zahraddeen MUSA, Mohammed U SULEIMAN, Shakiru Adekunle ADELEKE, Meeme Collins IORFA, and . "LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS." Nigerian Journal of Engineering 27.2 (2020), 5-8. Print.



APA (American Psychological Association) Style

BELLO, K. A., ABDULLAHI, U., ADEBISI, A. A., DODO, R. M., MUSA, Z., SULEIMAN, M. U., , S. A. A., IORFA, M. C. & (2020) LOW-TEMPERATURE IMPACT TOUGHNESS BEHAVIOURS OF QUENCHED AND TEMPERED 0.2% CARBON STEELS. Nigerian Journal of Engineering, 27 (2), 5-8.