Effect of Heat Treatment on Structure and Mechanical Properties of Sintered Fe—Ni Alloys

Nakamura, Morihiko; Tsuya, Kazuo

doi:10.1179/pom.1983.26.3.149

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…Nakamura and Tsuya 7) studied the effect of heat treatment on the structure and mechanical properties of sintered Fe-Ni alloys. Chan and Lin 8) investigated the sintering behaviour of various iron-nickel powder mixtures using elemental carbonyl iron and nickel powders.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

Lee

Chou

2005

Mater. Trans.

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The impact behaviour of Fe-2 mass% Ni sintered alloy as a function of strain rate has been studied using a material testing system at strain rate of 10 À3 , 10 À2 and 10 À1 s À1 and a split Hopkinson bar at strain rates ranging from 2:5 Â 10 3 s À1 to 6:8 Â 10 3 s À1 . The mechanical properties of the sintered alloy, including its impact strength, rate of work hardening and strain rate sensitivity are found to be significantly influenced by the strain rate at which deformation takes place. A constitutive law based on the Khan-Huang-Liang model is applied to predict the ratedependent plastic flow behaviour of the sintered alloy. The model predictions are found to be in good agreement with the observed experimental response. Even under heavy deformation conditions, none of the specimens were observed to fracture. Microstructural observations reveal that the grain size of the deformed specimen decreases as the strain rate increases. The reduction of the grain size can lead to an increase of the flow stress due to the enhancement of the grain boundary area.

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Section: Introductionmentioning

confidence: 99%

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

Lee

Chou

2005

Mater. Trans.

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“…13 and 7 . 52 g cm 23 for sintered densities of 85, 90 and 95% respectively), C p is the heat capacity (0 . 458 J g 21 K 21 ), s T is the stress and de T is the strain interval.…”

Section: Deformation Constitutive Equationmentioning

confidence: 99%

Dependence of impact deformation behaviour of Fe–2Ni sintered alloy on strain rate and sintered density

Lee¹,

Hsu

2006

Materials Science and Technology

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The present study investigates the impact deformation behaviour of Fe-2Ni sintered alloy as a function of the strain rate and sintered density using an MTS 810 servohydraulic machine and a compressive split Hopkinson bar. Impact deformation is conducted at room temperature at strain rates ranging from 10 23 to 8 . 1610 3 s 21 for specimens with sintered densities of 85, 90 and 95% respectively. The impact flow response is found to be sensitive to both the strain rate and the sintered density. Changes of the strain rate and sintered density induce corresponding changes in the flow strength, work hardening rate, strain rate sensitivity and activation volume. A constitutive law based on Gurson's plastic potential and the flow rule of Khan, Huang and Liang (KHL) provides a reasonable description of the flow behaviour of Fe-2Ni sintered alloy. Specimen fracture occurs when the strain rate exceeds 4610 3 s 21 and is dominated by a localised shearing mode. The degree of cracking increases with increasing strain rate or decreasing sintered density. The microstructural characteristics of the undeformed specimens vary with the sintered density. Following impact, the structural phase is unchanged from the undeformed condition, but the grain size is found to decrease with increasing strain rate for each sintered density. The reduction in grain size induces an increase in the flow stress. At a constant strain rate, the lower flow stress and smaller grain size observed in the specimens with a lower sintered density are attributed primarily to a higher overall porosity.

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“…The mechanical properties of sintered compacts are determined principally by their final density and matrix properties and by the loading conditions applied. The effects of porosity, heat treatment, sintering temperature and homogenization on the mechanical and wear properties of sintered alloys have been investigated both experimentally and theoretically [2][3][4][5][6]. However, relatively few studies have investigated the dynamic impact properties of sintered alloys as a function of the strain rate.…”

Section: Introductionmentioning

confidence: 99%

Strain rate dependence of impact properties of sintered 316L stainless steel

Lee

Lin

Liu

2006

Journal of Nuclear Materials

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Effect of Heat Treatment on Structure and Mechanical Properties of Sintered Fe—Ni Alloys

Cited by 5 publications

References 5 publications

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

Dependence of impact deformation behaviour of Fe–2Ni sintered alloy on strain rate and sintered density

Strain rate dependence of impact properties of sintered 316L stainless steel

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Effect of Heat Treatment on Structure and Mechanical Properties of Sintered Fe—Ni Alloys

Cited by 5 publications

References 5 publications

The Effect of Strain Rate on the Impact Behaviour of Fe&ndash;2 mass% Ni Sintered Alloy

The Effect of Strain Rate on the Impact Behaviour of Fe&ndash;2 mass% Ni Sintered Alloy

Dependence of impact deformation behaviour of Fe–2Ni sintered alloy on strain rate and sintered density

Strain rate dependence of impact properties of sintered 316L stainless steel

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The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy

The Effect of Strain Rate on the Impact Behaviour of Fe–2 mass% Ni Sintered Alloy