Interpretation of X-ray Powder Diffraction Patterns . By H. Lipson and H. Steeple. Pp. viii + 335 + 3 plates. (Mac-millan: London; St Martins Press: New York, May 1970.) £4.

X-Ray Diffraction

Biomedical materials and techniques to improve the tribological, mechanical and biomedical properties of orthopedic implants – A review article

New insights on cellular structures strengthening mechanisms and thermal stability of an austenitic stainless steel fabricated by laser powder-bed-fusion

Elastostatically induced structural disordering in amorphous alloys

Atomic packing density and its influence on the properties of Cu–Zr amorphous alloys

The aim of this work is to elucidate the formation of the amorphous phase in the Cu-Zr binary alloy system. It was found that 1 mm diameter rods with a fully amorphous structure can be prepared in a relatively wide range of compositions. In contrast, the formation of 2 mm diameter rods was achieved only for the Cu64Zr36 alloy and in the range of Cu53Zr47 - Cu50Zr50, which are compositions near the energetically stable Cu2Zr and CuZr intermetallic compounds. The difference between the calculated Gibbs free energy of the amorphous phase and the intermetallic compounds gives insight into the range of glass formation. In addition, the formation of the energetically stable phases can be kinetically by-passed owing to the crystallization of several competing phases.

Formation of amorphous phase in the binary Cu-Zr alloy system

Effects of amount of ε martensite, carbon content and cold working on damping capacity of an Fe–17% Mn martensitic alloy

The stacking fault energy (SFE) can play a key role in the deformation mechanism (e.g. transformation-induced plasticity and twinning-induced plasticity) of austenitic steels. Therefore, tremendous efforts have been devoted to exploring the evaluation methods and controlling parameters (e.g. alloying elements and temperature) that determine the SFE and its relationship to mechanical twinning. We provide here a summary of recent progress in studies of the SFE of austenite and of unsolved issues that may stimulate further investigation.

https://tandfonline.com/doi/pdf/10.1080/02670836.2015.1114252

Critical assessment 19: Stacking fault energies of austenitic steels

This study was performed to evaluate the effect of rolling speed on the development of texture and mechanical properties in a Ti-15(wt%)Mo alloy. Plates were initially prepared with dimensions of 100 mm (l) × 60 mm (w) × 15 mm (t) and rolled to an 88% thickness reduction. To induce the different shear strains between the surface and center of the plates, the rolling speed was varied between 3 and 56 m/min, respectively. The rolled materials were subsequently annealed at 1173 K for 60 s to obtain a recrystallized microstructure. To evaluate the mechanical properties such as yield and tensile strength as well as elongation and strain hardening, tensile tests were conducted on the rolled alloys. In addition, the texture of the rolled and annealed materials was analyzed by X-ray diffraction, and the characteristic grain boundary distribution was analyzed by electron back-scattered diffraction. It was found that different rolling speeds led to different texture development. Specifically, the γ-fiber component developed for the material rolled at low speed and contributed to the denser formation of {332}  twins, resulting in the high strain hardening exponent (n = 0.386) and uniform elongation (eu = 0.362). In contrast, the θ-fiber component developed in the material rolled at high speed and exhibited a lower density of deformation twinning, which contributed to the lower strain hardening exponent (n = 0.320) and uniform elongation (eu = 0.314) relative to the alloy rolled at low speed. Therefore, it can be concluded that enhanced twinning density depends on texture development, which is deeply related to the Schmid factor of the grains.

Young-Kook Lee

Papers

Formation of amorphous phase in the binary Cu-Zr alloy system

Effects of amount of ε martensite, carbon content and cold working on damping capacity of an Fe–17% Mn martensitic alloy

Critical assessment 19: Stacking fault energies of austenitic steels

Relationship between texture development and deformation twinning activity in Ti-15Mo alloy

Crystallographic characterization of Al18Mg3Ti2 intermetallic phase in Al–Zn–Mg–Cu–Zr–Ti alloy