Crystallization study of amorphous Al87.5Ni7Mm5Fe0.5 alloy by electrical resistivity measurement

Sahoo, K L; Panda, Ashis K.; Das, Swapan K; Rao, V. Venkateswara

doi:10.1016/s0167-577x(03)00477-4

Cited by 30 publications

(18 citation statements)

References 13 publications

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“…It is well known that different values of the Avrami exponent n predict different types of nucleation and growth mechanism, e.g. n ¼ 1.5 means three-dimensional growth with zero nucleation rate, n ¼ 1.5e2.5 growth with decreasing nucleation rate, n ¼ 2.5 growth with constant nucleation rate and n > 2.5 growth with increasing nucleation rate [29]. The average Avrami exponent n is 2.22, 2.50 and 2.58 for x ¼ 6, 7 and 9, indicating that the first crystallization process is the diffusioncontrolled growth with a decreasing, constant and increasing nucleation rate, respectively.…”

Section: Isothermal Annealingmentioning

confidence: 99%

Effects of La content on the glass transition and crystallization process of Al–Ni–La amorphous alloys

Huang¹,

Jiangkao²,

Rao³

et al. 2007

Intermetallics

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Section: Isothermal Annealingmentioning

confidence: 99%

Effects of La content on the glass transition and crystallization process of Al–Ni–La amorphous alloys

Huang¹,

Jiangkao²,

Rao³

et al. 2007

Intermetallics

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“…Among them, the growth process can be interface-controlled or diffusioncontrolled. It was thought to be merely diffusion-controlled for most the Al-TM-RE amorphous alloys through analyzing the Avrami exponent n in the isothermal annealing [23][24][25]. However, Nitsche et al [26] took different models to fit the experimental particle density distributions of fccAl nanoparticles in the Al 85 Ni 8 Y 5 Co 2 amorphous alloy and found that the growth process consisted of two stages, i.e.…”

Section: Resultsmentioning

confidence: 99%

Thermal stability and primary phase of Al–Ni(Cu)–La amorphous alloys

Huang

Rao

et al. 2008

Journal of Alloys and Compounds

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“…It indicates that the studies of kinetics and mechanism of the second crystallization stage are very important for development of high-strength Al-based alloys for elevated temperature applications as well as for estimation of the temperature ranges of consolidation processing of rapidly quenched materials. However, until now the second crystallization stage in Al-based amorphous alloys has been not studied at the proper level (e.g., [35,36]). As in the case of amorphous phases thermal stability of nanophase composites in the present study has been characterized by the onset crystallization temperature of the second crystallization stage, T ons2 , measured at constant rate heating which has been estimated from the curves R(T)/R 0 similar to that as T ons1 (Fig.…”

Section: Activity 23 Determination Of the Parameters Of Nanocompositmentioning

confidence: 99%

Development of High Strength Thermally Stable Al-based Alloys with Nanocomposite Structure

Maslov¹

2010

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)05-02-2010 REPORT TYPE Final Report DATES COVERED (From -To)01-Dec-06 -11-Jun-10 TITLE AND SUBTITLE PERFORMING ORGANIZATION REPORT NUMBERN/A SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)EOARD Unit 4515 BOX 14 APO AE 09421 SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S)STCU 06-8005 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTThis report results from a contract tasking Institute for Metal Physics, NAS of Ukraine as follows: The demands on materials set by aerospace and aircraft manufacturers include the development of alloys possessing high strength-to-weight ratios and capable to withstand high temperature exposures during service. One of the promising classes of materials which may meet these requirements are Al-based alloys with nanocomposite structures formed by partial crystallization of amorphous precursors the strength of which may exceed 1500 MPa. Solution of the problems concerning alloys chemistry and ability to tailor of certain microstructures is of prime importance for the development of new nanostructured materials. The goals of the project are to perform the systematic experimental studies of the effects of alloy composition and thermal prehistory on glassforming ability, thermal stability, crystallization behaviour and mechanical properties of a series binary, ternary and multicomponent Al-based alloys alloyed by transition metals and rare earths as well as to elaborate appropriate theoretical models of nanocrystallization processes. The main factors responsible for nanoscale microstructure formation will be determined from comparison of the experimental data with the model predictions.As a result a series of new Al-based alloys with nanocomposite structure with improved mechanical properties and enhanced thermal stability will be developed and the fundamental basis for the nanostructured alloys design will be created. SUBJECT TERMS

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Crystallization study of amorphous Al87.5Ni7Mm5Fe0.5 alloy by electrical resistivity measurement

Cited by 30 publications

References 13 publications

Effects of La content on the glass transition and crystallization process of Al–Ni–La amorphous alloys

Effects of La content on the glass transition and crystallization process of Al–Ni–La amorphous alloys

Thermal stability and primary phase of Al–Ni(Cu)–La amorphous alloys

Development of High Strength Thermally Stable Al-based Alloys with Nanocomposite Structure

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