Mechanical stability and magnetic properties of austenite

Ahmed, M. A.; Nasim, Iffat; Ayub, H.; Hashmi, F. H.; Khan, A. Q.

doi:10.1007/bf00369675

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…Meanwhile, austenite can be retained when maraging steels contain higher amounts of alloying elements like Ni, Mn, Mo, etc. . After the thermomechanical procedure, the lath martensitic microstructure was replaced by a uniform and refined microstructure without characteristic martensite morphology.…”

Section: Resultsmentioning

confidence: 99%

The microstructure and mechanical properties of prolonged and lower temperature aged Fe-Ni-Mn-Mo-Ti-Cr maraging steel

Barenji

2015

Mat.-wiss. u. Werkstofftech

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In this study, the microstructure and mechanical properties of Fe-Ni-Mn-Mo-Ti-Cr maraging steel at low temperature and prolonged aging condition were investigated. Optical and scanning electron microscopy examinations, tensile and hardness tests were conducted to study the microstructure, aging behavior and mechanical properties of the cold-rolled steel. The results showed that aging of cold rolled Fe-Ni-MnMo-Ti-Cr maraging steel resulted in the formation of Mo rich and Ti rich Lave phase precipitates. Existence of many dislocation cores due to cold rolling and subsequently, low temperature aging caused to formation of uniform distribution of very fine precipitates. The presence of these precipitates increased the yield and ultimate tensile strengths but couldn't improve the uniform tensile ductility. This alloy showed ultra-high fracture stress of about 1950 MPa with a negligible tensile elongation (about 2 %) at the peak aged condition. The fractographic studies indicated this alloy shows semi-brittle fracture in the subsequent aging treatment.

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Section: Resultsmentioning

confidence: 99%

The microstructure and mechanical properties of prolonged and lower temperature aged Fe-Ni-Mn-Mo-Ti-Cr maraging steel

Barenji

2015

Mat.-wiss. u. Werkstofftech

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“…Dislocation hardening of austenite and further alloying of maraging steels also lead to the austenite retention at ambient temperature [4]. The retained austenite represents mechanical instability during subsequent deformation at ambient temperature and transforms to martensite substantially [5]. Austenite retention has been occasionally favored for increased ductility of maraging steels at the expense of yield strength [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on the microstructure and tensile properties of Fe–Ni–Mn–Cr maraging alloys

Nedjad

Meimandi

Mahmoudi

et al. 2009

Materials Science and Engineering: A

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“…At temperatures between M s and M d , a large group of steels reveals the metastable properties. These properties appear to be substantially dependent on the chemical composition [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…In the literature pertinent to the subject, some experimental studies can be found [1][2][3]6] or studies on the microstructure [5,6]. However, the influence of the fatigue load level and number of cycles on the properties of this group of austenitic steels after the martensite has occurred is given scant attention [2,3].…”

Section: Introductionmentioning

confidence: 99%

Representation of Cyclic Properties of Austenitic Steels With Plasticity‐induced Martensitic Transformation

Kaleta

Zie

1998

Fatigue Fract Eng Mat Struct

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This study is part of a wider research project on the cyclic properties, energy cumulation and fatigue life of metastable austenitic steels undergoing a martensitic transformation induced by plastic straining. This paper considers the representation of the σ–ε hysteresis loop over a wide range of strain. A novel, power‐function model of cyclic elastic–plastic material behaviour was used. The model allows the occurrence of a cyclic yield point and the characteristic inflection point of the CSS curve, which separates the single‐phase (austenite) region from the two‐phase (austenite + martensite) one. The plastic strain corresponding to the inflection point is assumed to be a material constant and is termed the martensitic transformation cyclic limit ε1 . The generalization of the model made possible the representation of cyclic softening of the two‐phase material. In addition, the study chose a measurement technique that assisted the estimation of the cyclic plastic strain (ε1 ) inducing the martensitic transformation. The crossed magnetomechanical (Villari) effect was shown to be applicable in detecting the nucleation and estimating the increase of the α′‐martensite content. The identification was performed making use of experimental results obtained from an AISI 304 high nickel content steel. The tests were performed under both increasing and constant plastic strain amplitude. The measured quantities were: total strain εt elastic strain εe , plastic strain εp , stress σ and hysteresis loop area ΔW. The results justify the assumed model.

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Mechanical stability and magnetic properties of austenite

Cited by 5 publications

References 5 publications

The microstructure and mechanical properties of prolonged and lower temperature aged Fe-Ni-Mn-Mo-Ti-Cr maraging steel

The microstructure and mechanical properties of prolonged and lower temperature aged Fe-Ni-Mn-Mo-Ti-Cr maraging steel

Effect of aging on the microstructure and tensile properties of Fe–Ni–Mn–Cr maraging alloys

Representation of Cyclic Properties of Austenitic Steels With Plasticity‐induced Martensitic Transformation

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