Effect of lithium on the mechanical properties of armco iron

Попович, В. В.; Shtykalo, I. G.; Chaevskii, M. I.

doi:10.1007/bf00715080

Cited by 11 publications

(4 citation statements)

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“…In their calculations of interfacial energies using a Wigner-Seitz atomic cell model, Miedema and Broeder [31] found that an interactive term accounted for 11% of their value for nickel-lithium system and 82% of that for the nickelsodium system. However, this term was not interactive in the sense that it was concerned with the formation of a new bulk phase which might initiate cracking, as does Li2C2 for iron [11][12][13]. Concern about the possible formation of this carbide and its effect on the properties of nickel prompted us to use high-purity material in this work, but even this contained 20 p.p.m, carbon.…”

Section: Discussionmentioning

confidence: 99%

“…The atom fraction of carbon in the nickel is 1 x 10 -4 and this activity criterion could be met considering the low solubility of carbon in nickel at 250 ~ [27]. The location, habit or rate of formation of LizC2 could exert a major influence on the ductility of nickel, as it does for iron [11][12][13]. For the formation of LizC2 to be significant, the reaction must give rise to needles or sheets growing along grain boundaries, but the fractographs of samples stressed to destruction in lithium provided no supporting evidence.…”

Section: Discussionmentioning

confidence: 99%

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Tensile properties of high-purity nickel stressed in alkali metal environments

Nicholas

Fernback

1991

J Mater Sci

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Tensile failure of high-purity (99.99%) nickel varied systematically with the chemistry of alkali metal environments. Failure was by microvoid coalescence when stressed to destruction in argon, caesium, rubidium and potassium at 250 ~ The ultimate tensile strengths ,were about 250 MPa and the elongations at failure were approximately 45%. The fracture surfaces of samples tested in sodium displayed evidence of intergranular and transgranular cleavage, but the strength and ductility values were similar to those of samples tested in argon. However, failure in lithium was predominantly by intergranular cleavage, and the average ultimate tensile strengths and elongations to failure were only 10-7 MPa and 6%. Intergranular cleavage and severe embrittlement was caused also by sodium containing more than 0.2% lithium, but pre-exposure and slow straining had little influence. It is concluded that embrittlement by lithium is a physical process that can be related to parameters such as interfacial energies.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Tensile properties of high-purity nickel stressed in alkali metal environments

Nicholas

Fernback

1991

J Mater Sci

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“…lower than in vacuum. 5 The tensile strength of Fe-l7Cr-lON1 (wt %) stainless steel Is not significantly affected by lithium; 6 however, the ductility depends on strain rate and temperature.…”

Section: Data For the Effect Of Lithium On The Tensile Properties Of mentioning

confidence: 99%

Influence of a flowing lithium environment on the fatigue and tensile properties of type 316 stainless steel

Chopra

Smith

1984

Journal of Nuclear Materials

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Low-cycle fatigue and tensile data have been obtained on Type 316 stainless steel in a flowing lithium environment of controlled purity. The results show that the fatigue life of the steal in flowing lithium at 755 K Is greater than in air. Preexposure of the material to lithium reduces fatigue life-The reduction In fatigue life may be attributed to the formation of a weak ferrite layer after lithium exposure. Tensile data for cold-worked Type 316 stainless steel indicate that at temperatures between 476 and 755 K, a flowing lithium environment has little or no effect on the tensile properties of the steel.

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“…Consequently, the modification of the microscopic and mesoscopic structure leads to embrittlement and weakening of the materials. Experimental tests of stainless steels evidence that liquid lithium corrosion reduces the ultimate tensile strength, ductility and fatigue life [14][15][16][17]. The degree of the degradation of mechanical properties depends primarily on temperature, stain rate, purity of lithium and flowing state of liquid lithium.…”

Section: Introductionmentioning

confidence: 99%