Characteristics of Japanese sword produced from tatara steel

Matsumoto, C A; Das, Abhimanyu; Ohba, Takayoshi; Morito, Shigekazu; Hayashi, Teruaki; Takami, Go

doi:10.1016/j.jallcom.2012.05.039

Cited by 10 publications

(6 citation statements)

References 9 publications

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“…7,8) For 0.60.8 mass%C, the thickness of martensite block is about 500700 nm. 9) In order to precisely measure martensite orientation, the scan step should be much smaller than the martensite block thickness. In our experiences, the scan step should be equal or less than 200 nm for a good characterization of martensite in those steels.…”

Section: Ebsd Experimentsmentioning

confidence: 99%

Automatic Reconstruction Approach to Characterization of Prior-Austenite Microstructure in Various Japanese Swords

et al. 2015

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Each Japanese sword is unique by its microstructure resulted by the steel composition and heat treatment. In this study, the automatic reconstruction method was applied for characterizing the prior-austenite microstructure at the sharp edge of three Japanese swords made in different time periods. The reconstructed prior-austenite microstructure was compared with that of three carbon steels, in order to clarify the variations of carbon content and heating temperatures of the swords. It was found that in carbon steels, the austenite microstructure is probably affected by initial microstructures, which is predominantly determined by carbon content. The three swords have similar carbon content, but their prior-austenite microstructures are considerably different, probably due to their heating temperatures. The strength at the sharp edge of the modern sword is significantly higher than that of the old sword. It may be due to the fine-grained prior-austenite in the modern sword compared with the abnormally coarse grains observed in the old sword. In order to obtain fine-grained austenite along with high strength and hardness of the cutting edge, it is recommended that the carbon content of Japanese sword is 0.60.7 mass%, and the heating temperature is from 750 to 800°C.

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Section: Ebsd Experimentsmentioning

confidence: 99%

Automatic Reconstruction Approach to Characterization of Prior-Austenite Microstructure in Various Japanese Swords

et al. 2015

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“…This ferrite always appears in the union of both steels of such different carbon composition. The union is therefore very tenacious and effective [16][17][18][19].…”

Section: Tempering Japanese Steel Spanish Steelmentioning

confidence: 99%

Welding by Hot Forging of Two Carbon Steels for the Manufacture of Spanish and Japanese Weapons

Duarte¹,

Gw²,

Sánchez³

et al. 2018

J Material Sci Eng

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“…In other parts of the world, swords have been differently made, in which other various types of material such as Tatara steel [2][3][4][5], Tamahakana steel [6], Damascus steel [7] were used. According to documentations and archeological researches, many traditional ways for producing swords have been available, for example Japanese Samurai technique [2][3][4][5][6], Eastern Damascus technique, Welded Damascus technique [8][9][10], etc. It was reported that Japanese swords have a long history more than a thousand years, in which Japanese sword smiths have their own special techniques to produce the swords [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fold-Forging Techniques for Sword Making Process on Mechanical Properties of Medium Carbon Steel

Paveebunvipak¹,

Yu-on²,

Rotpaisarnkit³

et al. 2017

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Abstract. The most important procedure for making a traditional Samurai sword consists of metal forming at high temperature and subsequent quenching. Hereby, two specific techniques are additionally included, namely, fold-forging and mixing of different steel grades. In this work, both particular processes were applied to the steel grade AISI 1055, a conventional low carbon steel and the Nam-Phee steel, which has been commonly used to produce the well-known Nam-Phee sword for a long time in Thailand. Afterwards, mechanical properties of produced samples were investigated and compared. Four combinations between the examined steels and both techniques were taken into account. It was found that Nam-Phee steel samples subjected to the fold-forging obviously showed more homogenous and finer microstructure. Their resulting tensile strength, flexural strength and impact energy were significantly increased. The improved mechanical properties of the Nam-Phee specimens were close to those of the Tamahagane steel used for making Samurai sword. Moreover, AISI 1055 steel specimens mixed with the low carbon ductile steel as core exhibited much higher flexural strength and impact energy.

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Characteristics of Japanese sword produced from tatara steel

Cited by 10 publications

References 9 publications

Automatic Reconstruction Approach to Characterization of Prior-Austenite Microstructure in Various Japanese Swords

Automatic Reconstruction Approach to Characterization of Prior-Austenite Microstructure in Various Japanese Swords

Welding by Hot Forging of Two Carbon Steels for the Manufacture of Spanish and Japanese Weapons

Effect of Fold-Forging Techniques for Sword Making Process on Mechanical Properties of Medium Carbon Steel

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