Control of precipitation behavior in reduced activation steels by intermediate heat treatment

Xia, Zhen; Zhang, C.; Yang, Zhigang

doi:10.1016/j.msea.2011.05.084

Cited by 56 publications

(20 citation statements)

References 20 publications

(40 reference statements)

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“…However, the precipitates are generally enriched with Cr instead of Fe212731. The difference is probably due to high content of Cr in A2 and fcc phases in the current study313233.…”

Section: Discussionmentioning

confidence: 64%

Precipitation behavior of AlxCoCrFeNi high entropy alloys under ion irradiation

Yang

Xia

Shi

et al. 2016

Sci Rep

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Materials performance is central to the satisfactory operation of current and future nuclear energy systems due to the severe irradiation environment in reactors. Searching for structural materials with excellent irradiation tolerance is crucial for developing the next generation nuclear reactors. Here, we report the irradiation responses of a novel multi-component alloy system, high entropy alloy (HEA) AlxCoCrFeNi (x = 0.1, 0.75 and 1.5), focusing on their precipitation behavior. It is found that the single phase system, Al0.1CoCrFeNi, exhibits a great phase stability against ion irradiation. No precipitate is observed even at the highest fluence. In contrast, numerous coherent precipitates are present in both multi-phase HEAs. Based on the irradiation-induced/enhanced precipitation theory, the excellent structural stability against precipitation of Al0.1CoCrFeNi is attributed to the high configurational entropy and low atomic diffusion, which reduces the thermodynamic driving force and kinetically restrains the formation of precipitate, respectively. For the multiphase HEAs, the phase separations and formation of ordered phases reduce the system configurational entropy, resulting in the similar precipitation behavior with corresponding binary or ternary conventional alloys. This study demonstrates the structural stability of single-phase HEAs under irradiation and provides important implications for searching for HEAs with higher irradiation tolerance.

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“…However, the precipitates are generally enriched with Cr instead of Fe212731. The difference is probably due to high content of Cr in A2 and fcc phases in the current study313233.…”

Section: Discussionmentioning

confidence: 64%

Precipitation behavior of AlxCoCrFeNi high entropy alloys under ion irradiation

Yang

Xia

Shi

et al. 2016

Sci Rep

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“…For most RAFM steels, the major alloying elements are in the ranges of 7-9 wt.% for Cr and 1-2 wt.% for W [1,5]. It has been demonstrated that a careful selection of the chemical composition is very important for improving the mechanical properties [6,7], and the effects of the major alloying elements cannot be neglected. Numerous efforts have been devoted to developing RAFM steels and studying the concentration effects of Cr and W on the defect behaviors (vacancies and selfinterstitial) and mechanical properties of Fe-Cr alloys [5,8,9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Cr and W additions on the stability and migration of He in bcc Fe: A first-principles study

Ding

et al. 2016

Computational Materials Science

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“…Heterophase interfaces play an important role in determining the physical properties of materials from multiple aspects123456789. For example, it is well-known that electrical resistivity can be tuned by interfaces which usually act as obstacles to charge carriers10.…”

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confidence: 99%

What determines the interfacial configuration of Nb/Al2O3 and Nb/MgO interface

Fang

et al. 2016

Sci Rep

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Nb films are deposited on single crystal Al2O3 (110) and MgO(111) substrates by e-beam evaporation technique. Structure of Nb films and orientation relationships (ORs) of Nb/Al2O3 and Nb/MgO interface are studied and compared by the combination of experiments and simulations. The experiments show that the Nb films obtain strong (110) texture, and the Nb film on Al2O3(110) substrate shows a higher crystalline quality than that on MgO(111) substrate. First principle calculations show that both the lattice mismatch and the strength of interface bonding play major roles in determining the crystalline perfection of Nb films and ORs between Nb films and single crystal ceramic substrates. The fundamental mechanisms for forming the interfacial configuration in terms of the lattice mismatch and the strength of interface bonding are discussed.

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Control of precipitation behavior in reduced activation steels by intermediate heat treatment

Cited by 56 publications

References 20 publications

Precipitation behavior of AlxCoCrFeNi high entropy alloys under ion irradiation

Precipitation behavior of AlxCoCrFeNi high entropy alloys under ion irradiation

Effects of Cr and W additions on the stability and migration of He in bcc Fe: A first-principles study

What determines the interfacial configuration of Nb/Al2O3 and Nb/MgO interface

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