Effect of MnS inclusion and crystallographic texture on anisotropy in Charpy impact toughness of low carbon ferritic steel

Abstract Three steels were designed based on HSLA-100 with additional levels of Mn, Ni, Cr and Cu. The steels were prepared by controlled rolling and tempered at temperatures in range of 550–700°C. The continuous cooling time curves were shifted to longer times and lower temperatures with the increased tendency for the formation of martensite at lower cooling rates. The microstructures revealed that controlled rolling results in austenite with uniform fine grain structure. The steel with the highest amount of Mn showed the greatest strength after tempering at 750 °C. The top strength was attributed to the formation of Cu-rich particles. The steel with 1.03 wt.% Mn, tempered at 650 °C exhibited the best Charpy impact toughness at –85°C. On the other hand, the steel that contained 2.11 wt.% Mn and tempered at 700 °C showed the highest yield strength of 1 097.5 MPa (∼159 ksi) and an impact toughness of 41.6 J at –85°C.

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Charpy impact toughness of conventional and advanced composite laminates for aircraft construction

Materials Research ◽

10.1590/s1516-14392009000400004 ◽

2009 ◽

Vol 12 (4) ◽

pp. 395-403 ◽

Cited By ~ 15

Author(s):

José Ricardo Tarpani ◽

Omar Maluf ◽

Maria Cristina Adami Gatti

Keyword(s):

Impact Toughness ◽

Composite Laminates ◽

Charpy Impact ◽

Advanced Composite ◽

Charpy Impact Toughness

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Effects of Metallurgical and Mechanical Factors on Charpy Impact Toughness of Extra-Low Interstitial Ferritic Stainless Steels

Toughness of Ferritic Stainless Steels ◽

10.1520/stp38209s ◽

2009 ◽

pp. 202-202-19 ◽

Cited By ~ 1

Author(s):

N Ohashi ◽

Y Ono ◽

N Kinoshita ◽

K Yoshioka

Keyword(s):

Impact Toughness ◽

Stainless Steels ◽

Charpy Impact ◽

Ferritic Stainless Steels ◽

Charpy Impact Toughness ◽

Mechanical Factors

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Effects of Al, Si and N Content on the Formation of M-A Constituent and HAZ Toughness of Ti-Containing Low-Carbon Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1016.42 ◽

2021 ◽

Vol 1016 ◽

pp. 42-49

Author(s):

Kook Soo Bang ◽

Joo Hyeon Cha ◽

Kyu Tae Han ◽

Hong Chul Jeong

Keyword(s):

Carbon Steel ◽

Impact Toughness ◽

Low Carbon Steel ◽

Charpy Impact ◽

Coarse Grained ◽

Low Carbon ◽

N Content ◽

Si Content ◽

The Impact ◽

Haz Toughness

The present work investigated the effects of Al, Si, and N content on the impact toughness of the coarse-grained heat-affected zone (CGHAZ) of Ti-containing low-carbon steel. Simulated CGHAZ of differing Al, Si, and N contents were prepared, and Charpy impact toughness was determined. The results were interpreted in terms of microstructure, especially martensite-austenite (M-A) constituent. All elements accelerated ferrite transformation in CGHAZ but at the same time increased the amount of M-A constituent, thereby deteriorating CGHAZ toughness. It is believed that Al, Si, and free N that is uncombined with Ti retard the decomposition of austenite into pearlite and increase the carbon content in the last transforming austenite, thus increasing the amount of M-A constituent. Regardless of the amount of ferrite in CGHAZ, its toughness decreased linearly with an increase of M-A constituent in this experiment, indicating that HAZ toughness is predominantly affected by the presence of M-A constituent. When a comparison of the effectiveness is made between Al and Si, it showed that a decrease in Si content is more effective in reducing M-A constituents.

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