About: Materials Transactions is an academic journal. The journal publishes majorly in the area(s): Alloy & Microstructure. It has an ISSN identifier of 0021-4434. It is also open access. Over the lifetime, 8360 publication(s) have been published receiving 109617 citation(s).
Papers published on a yearly basis
20 Dec 2005-Materials Transactions
TL;DR: In this paper, the atomic size difference, heat of mixing (H mix), and period of the constituent elements in the periodic table were classified according to the atomic sizes of the BMGs discovered to date.
Abstract: Bulk metallic glasses (BMGs) have been classified according to the atomic size difference, heat of mixing (� H mix ) and period of the constituent elements in the periodic table. The BMGs discovered to date are classified into seven groups on the basis of a previous result by Inoue. The seven groups are as follows: (G-I) ETM/Ln-LTM/BM-Al/Ga, (G-II) ETM/Ln-LTM/BM-Metalloid, (G-III) Al/Ga-LTM/BMMetalloid, (G-IV) IIA-ETM/Ln-LTM/BM, (G-V) LTM/BM-Metalloid, (G-VI) ETM/Ln-LTM/BM and (G-VII) IIA-LTM/BM, where ETM, Ln, LTM, BM and IIA refer to early transition, lanthanide, late transition, group IIIB–IVB and group IIA-group metals, respectively. The main alloying element of ternary G-I, G-V and G-VII, ternary G-II and G-IV, and ternary G-VI BMGs is the largest, intermediate and smallest atomic radius compared to the other alloying elements, respectively. The main alloying element of ternary BMGs belonging to G-I, G-V, G-VI and G
01 Jan 2001-Materials Transactions
TL;DR: In this paper, the RS P/M alloys exhibited excellent elevated-temperature yield strength that was 510 MPa at 423 K. The specific tensile yield strength was four times as high as that of a commercial AZ91-T6 alloy, and was higher than those of conventional titanium (Ti-6Al-4V) and aluminum (7075-T 6) alloys.
Abstract: Nanocrystalline magnesium alloys having high tensile strength, high elevated-temperature tensile strength, high-strain-rate superplasticity and high thermal stability have been developed in Mg 97 Zn 1 Y 2 (at% I alloy by rapidly solidified powder metallurgy (RS P/M) processing. The tensile yield strength and elongation that were dependent on the consolidation temperature were in the ranges of 480 to 610MPa and 5 to 16%, respectively. Young's modulus of the RS P/M alloy was 45 GPa. The specific tensile yield strength was four times as high as that of a commercial AZ91-T6 alloy, and was higher than those of conventional titanium (Ti-6Al-4V) and aluminum (7075-T6) alloys. The RS P/M alloys exhibited excellent elevated-temperature yield strength that was 510 MPa at 423 K. The RS P/M alloy also exhibited high-strain-rate superplasticity at a wide strain-rate range from I × 10 - to I × 10 0 s -1 and at a low temperature of 623 K. It is expected that the Mg 97 Zn 1 Y 2 RS P/M alloy can he applied in some fields that requires simultaneously the high specific strength at ambient and elevated temperatures and high workability.
01 Nov 2007-Materials Transactions
TL;DR: The aged-rejuvenation-glue-liquid (ARGL) shear band model has been proposed for metallic glasses based on small-scale molecular dynamics simulations up to 20,000 atoms and thermomechanical analysis as mentioned in this paper.
Abstract: The aged-rejuvenation-glue-liquid (ARGL) shear band model has been proposed for metallic glasses (Acta Mater. 54 (2006) 4293), based on small-scale molecular dynamics simulations up to 20,000 atoms and thermomechanical analysis. The model predicts the existence of a critical lengthscale � 10 nm, above which melting could occur in shear-alienated glass. Large-scale molecular dynamics simulations with up to 5 million atoms have directly verified this prediction. When the applied stress exceeds the glue traction (computed separately before in a shear cohesive zone, or an amorphous-amorphous ‘‘generalized stacking fault energy’’ calculation), we indeed observe maturation of the shear band embryo into bona fide shear crack, accompanied by melting. In contrast, when the applied stress is below the glue traction, the shear band embryo does not propagate, becomes diffuse, and eventually dies. Thus this all-important quantity, the glue traction which is a property of shearalienated glass, controls the macroscopic yield point of well-aged glass. We further suggest that the disruption of chemical short-range order (‘‘chemical softening’’) governs the glue traction microscopically. Catastrophic thermal softening occurs only after chemical alienation and softening in our simulation, after the shear band embryo has already run a critical length. [doi:10.2320/matertrans.MJ200769]
01 Nov 2007-Materials Transactions
TL;DR: In this paper, the formation and mechanical properties of Mg 97 Zn 1 RE 2 alloys with long-period stacking ordered (LPSO) structures were investigated by examining RE = Y, La, Ce, Pr, Sm, Nd, Dy, Ho, Er, Gd, Tb and Tm LPSO structures.
Abstract: We investigated the formation and mechanical properties of Mg 97 Zn 1 RE 2 alloys with long-period stacking ordered (LPSO) structures by examining RE = Y, La, Ce, Pr, Sm, Nd, Gd, Dy, Ho, Er, Tb, Tm and Yb The LPSO phase developed for RE = Y, Dy, Ho, Er, Gd, Tb and Tm LPSO Mg-Zn-RE alloys are either type I, in which the LPSO phase forms during solidification: Mg-Zn-Y, Mg-Zn-Dy, Mg-Zn-Ho, Mg-Zn-Er and Mg-Zn-Tm, or type II, in which the LPSO phase is nonexistent in as-cast ingots but precipitates with soaking at 773 K: Mg-Zn-Gd and Mg-Zn-Tb The criteria for REs that form an LPSO phase in Mg-Zn-RE alloys are discussed Mg-Zn-RE alloys with an LPSO phase, which were worked by hot extrusion, include high strength both at ambient and elevated temperatures, and good ductility Their tensile yield strength, ultimate strength and elongation were 342-377 MPa, 372-410MPa and 3-9%, respectively at ambient temperature, and 292-310MPa, 322-345 MPa and 4-13% at 473 K The LPSO Mg-Zn-RE alloys are promising candidates for lightweight structural materials
20 Apr 2001-Materials Transactions
TL;DR: In this article, the authors studied the mechanical behavior of Zr 40 Ti 14 Ni 10 Cu 12 Be 24 through uniaxial compression and nanoindentation experiments and found that shear is more likely caused by changes in viscosity associated with increased free volume in the shear bands.
Abstract: We have studied the mechanical behavior of Zr 40 Ti 14 Ni 10 Cu 12 Be 24 through uniaxial compression and nanoindentation experiments. Quantitative measurements of the serrated plastic flow observed during uniaxial compression are reported. These data are used to predict temperature increases in single shear bands due to local adiabatic heating caused by the work done on the sample as shear propagates progressively across the sample. Since the predicted temperature increases are insufficient to reach the glass transition temperature, it is unlikely that localized heating is the primary cause of flow localization. Instead, localization of shear is more likely caused by changes in viscosity associated with increased free volume in the shear bands. The orientation of the shear bands in compression tests and an indentation size effect for the onset of plastic flow in nanoindentation both point to increased free volume as the cause of localization.
Related Journals (5)
13.4K papers, 455.3K citations
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
35.5K papers, 1M citations
Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science
17K papers, 497.7K citations
9.7K papers, 161.1K citations
16.2K papers, 946.9K citations