Mössbauer study of the early stages of aging in 18Ni(350) maraging steel

Li, Xiaodong; Yin, Zhaoxia; Li, H. B.; Lei, T.C.; Liu, M. L.; Liu, Xuewu; Jin, Mingzhi

doi:10.1016/0254-0584(93)90075-w

Cited by 14 publications

(6 citation statements)

References 6 publications

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“…The techniques used for carrying out these studies included transmission electron microscopy [9, 10, 13 -20], atom probe field ion microscopy [21 -27], Mössbauer spectroscopy [17,28], small-angle X-ray scattering [15,18], and small-angle neutron scattering [29]. This has been importantly due to a variety of sophisticated research instruments becoming available for studying decomposition and characterization of precipitating phases.…”

Section: Developments In Understanding the Precipitating Phasesmentioning

confidence: 99%

Progress in understanding the metallurgy of 18% nickel maraging steels

Rao

2006

International Journal of Materials Research

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Progress in understanding the metallurgy of 18 % nickel maraging steelsMaraging steels based on iron -nickel martensite constitute a very important family of high-strength steels, which distinguishes itself by demonstrating an unparalleled combination of excellent fabricability and high strength and fracture toughness after heat treatment. Heat treatment of these steels has now been perfected to ensure consistently high levels of strength, ductility, and toughness in a variety of product shapes and sizes. Cobalt-free variants have been commercialized as part of efforts to save production costs. Further knowledge has been generated on 18 % nickel maraging steels regarding phases precipitating during aging, thermal embrittlement, thermal cycling and austenite reversion/retention and their effect on mechanical properties. The paper reviews the progress made over the last one and half decades.

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Section: Developments In Understanding the Precipitating Phasesmentioning

confidence: 99%

Progress in understanding the metallurgy of 18% nickel maraging steels

Rao

2006

International Journal of Materials Research

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“…Table 4. Contributions and hyperfine parameters of fitted Mössbauer spectra components for initial powder sample and the sleeve (the recognition of martensite-like and austenite-like components according to [29][30][31][32][33][34][35] The mean values <B hf > differs very slightly (32.41 T − 32.24 T = 0.17 T) i.e., about 0.5%. Such small difference is a strong proof that the local atomic ordering is very similar in both samples despite significant difference in morphology and metallographic microstructure.…”

Section: Mössbauer Spectrometrymentioning

confidence: 99%

Performance of Maraging Steel Sleeves Produced by SLM with Subsequent Age Hardening

Tyczyński¹,

Siemiątkowski

Bąk³

et al. 2020

Materials

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In the paper, the researches on sleeves made out of maraging steel 1.2709 using selective laser melting (SLM) technology are presented. This additive technology is recognized as favorable for the environment, due to 100% use of material and durability of manufactured details. The fabricated sleeves underwent subsequent tests, in particular, microhardness, porosity and homogeneity of the material was examined before and after heat treatment and salt bath nitrocarburizing process. Two kinds of fatigue tests were performed. The first consisted of the typical sinusoidal alternating load, the other was the high pressure pulse load test close to the real work conditions. It is of high importance that the fatigue strength of the tested sleeves is considerably higher than that of the similarly produced details shaped as a standard samples for tensile stress. The Mössbauer spectrometry analysis of hyperfine magnetic field distributions proved that SLM did not change considerably the martensite structure at atomic level.

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“…The nanometric structure of the precipitates makes them hard to analyse. Because of this, a variety of techniques have been used to study their precipitation behaviour, including: transmission electron microscopy (TEM) 4 , small angle X-ray scattering (SAXS) 7 , small angle neutron scattering (SANS) 8 , electrolyte extraction method 9 , positron annihilation 10 and Mӧssbauer spectroscopy [11][12][13][14][15] . Since Maraging-300 steel has about 66 wt% Fe, Mӧssbauer spectroscopy becomes a powerful local technique for studying the mobility and redistribution of solute atoms during ageing.…”

Section: Introductionmentioning

confidence: 99%

“…Some authors [11][12][13] studied the early stages (≤ 1 h) of the ageing process of both Maraging-350 and a Fe-19Co-14Mo-10Ni maraging steel using Mӧssbauer spectroscopy. They analysed samples aged at 500°C for times varying between 2 and 60 min.…”

Section: Introductionmentioning

confidence: 99%

An Atomic Redistribution Study of the 440°C Ageing Kinetics in Maraging-300 Steel

Silva¹,

Vasconcelos

Silva

et al. 2019

Mat. Res.

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Mӧssbauer spectroscopy, X-ray diffraction and hardness measurements were used to investigate the atomic redistribution and phase transformation of solution-treated and 440°C aged Maraging-300 steel specimens. The ageing temperature that resulted in the best mechanical properties in this steel was 480ºC. At 440ºC, the formation of the precipitates that assure excellent mechanical properties of the maraging steel (Ni 3 Ti, Fe 2 Mo) was not expected. The results indicated that Mo and Ti redistribution was severe during the first hour of ageing. The mobility of the Ni atoms probably occurred during all stages of the ageing process, and the Co atoms remained close to Fe atomic sites. An irregular behaviour of the formation of paramagnetic phases containing iron was observed, and some evidence of the formation of these phases without Fe will be discussed. The formation of metastable phases was suggested and the possibility of austenite reversion was not discarded at this ageing temperature.

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Mössbauer study of the early stages of aging in 18Ni(350) maraging steel

Cited by 14 publications

References 6 publications

Progress in understanding the metallurgy of 18% nickel maraging steels

Progress in understanding the metallurgy of 18% nickel maraging steels

Performance of Maraging Steel Sleeves Produced by SLM with Subsequent Age Hardening

An Atomic Redistribution Study of the 440°C Ageing Kinetics in Maraging-300 Steel

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