Strain ageing in heavily drawn eutectoid steel wires

Watte, P.; Humbeeck, Jan Van; Aernoudt, Etienne; Lefever, I.

doi:10.1016/1359-6462(95)00479-3

Cited by 79 publications

(39 citation statements)

References 12 publications

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“…Recovery and recrystallization of the cold worked structure happen at temperatures of 400 °C and above. Other authors [5,6] confirmed the details put forth by Yamada with minor variations that were probably due to differences of composition or strain drawing intensity of the used wires. In their review of 2001, Phelippeau et al [7] summarized the knowledge on the micro-structural mechanisms in the first stage of SSA (diffusion of interstitial C atoms to dislocations) and second stage (diffusion of C atoms liberated by the partial decomposition of cementite).…”

Section: Introductionsupporting

confidence: 68%

Thermo-mechanical treatment effects on stress relaxation and hydrogen embrittlement of cold-drawn eutectoid steels

2011

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The effects of the temperature and stretching levels used in the stress-relieving treatment of cold-drawn eutectoid steel wires are evaluated with the aim of improving the stress relaxation behavior and the resistance to hydrogen embrittlement. Five industrial treatments are studied, combining three temperatures (330, 400, and 460 °C) and three stretching levels (38, 50 and 64% of the rupture load). The change of the residual stress produced by the treatments is taken into consideration to account for the results. Surface residual stresses allow us to explain the time to failure in standard hydrogen embrittlement tests.

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Section: Introductionsupporting

confidence: 68%

Thermo-mechanical treatment effects on stress relaxation and hydrogen embrittlement of cold-drawn eutectoid steels

2011

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“…The Q value of the first peak, 67 kJ/mol to 70 kJ/mol, corresponds to the activation energy for the diffusion of carbon atoms in ferrite, 66.9 kJ/mol [16,17], indicating that the occurrence of the first peak of aging is controlled by the migration of interstitially dissolved carbon atoms to dislocations in α'- martensite. At low aging temperatures, carbon atoms diffuse to neighboring dislocations and lock them in α'-martensite.…”

Section: Kinetics During Agingmentioning

confidence: 99%

Effects of deformation strain and aging temperature on strain aging behavior in a 304 stainless steel

Lee

Choi

et al. 2010

Met. Mater. Int.

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The effects of deformation strain and aging temperature on strain aging behavior in a 304 stainless steel were investigated. Age hardening of a cold-rolled 304 stainless steel was significantly influenced by the amount of α'-martensite as well as aging temperature. The similar variation of tensile strength to the amount of α'-martensite with aging temperature indicated that tensile strength of an aged steel is significantly influenced by the amount of α'-martensite formed during cold deformation. The increase of strength during aging in a 304 stainless steel cold-rolled with 40 % reduction is attributed to the additional formation of α'-martensite at 450°C as well as to the increase of hardness in both the α'-martensite and austenite phases.

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“…Among these factors, dynamic strain aging (cementite dissolution) that occurs during wire drawing has been suspected to be one of the main causes of delamination [16,17]. Recent investigations [18,19] have shown that lamellar cementite undergoes partial dissolution during heavy cold-working and the dissolved carbon atoms are subsequently redistributed in lamellar ferrite.…”

Section: Effect Of Alloying Elements On the Occurrence Of Delaminationmentioning

confidence: 97%

The effects of alloying elements on tensile strength and the occurrence of delamination in cold-drawn hyper-eutectoid steel wires

Park

Lee

et al. 2009

Met. Mater. Int.

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The effects of alloying elements and initial interlamellar spacing on tensile strength and the occurrence of delamination in cold-drawn hyper-eutectoid steel wires were investigated under equivalent drawing conditions. The initial interlamellar spacing showed little influence on the occurrence of delamination. The addition of Cr effectively increased attainable tensile strength, since the added Cr not only increased tensile strength but also delayed delamination. The addition of Ni also increased attainable tensile strength, since the effect of the added Ni on delaying delamination prevailed over the tendency to decrease tensile strength and work hardening. The addition of Cr increased the attainable tensile strength more effectively than the addition of Ni in cold-drawn hyper-eutectoid steel wires, although the added Ni markedly delayed delamination-associated strain.

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Strain ageing in heavily drawn eutectoid steel wires

Cited by 79 publications

References 12 publications

Thermo-mechanical treatment effects on stress relaxation and hydrogen embrittlement of cold-drawn eutectoid steels

Thermo-mechanical treatment effects on stress relaxation and hydrogen embrittlement of cold-drawn eutectoid steels

Effects of deformation strain and aging temperature on strain aging behavior in a 304 stainless steel

The effects of alloying elements on tensile strength and the occurrence of delamination in cold-drawn hyper-eutectoid steel wires

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