Metals and Alloy Materials
Summary
Metals and their alloys underpin modern engineering, offering combinations of strength, toughness, conductivity and corrosion resistance across applications from infrastructure and transport to energy and biomedical devices. Control of phase composition, grain size and defect populations via processing—casting, forging, rolling, heat treatment, additive manufacturing or powder metallurgy—enables tailored mechanical and functional properties. Structural steels exploit microalloying, phase transformations and lamellar architectures to balance high yield strength with impact toughness, while aluminium and magnesium alloys deliver lightweight performance in aerospace and automotive sectors. Titanium and its intermetallics serve high-temperature and biocompatible roles, whereas nickel-based superalloys and refractory Mo–Si–B composites endure extreme thermal environments. Emerging composite and gradient materials integrate ceramic reinforcements or compositional gradients to further extend wear resistance, stiffness and thermal stability. Advances in in situ characterisation and multiscale modelling continue to reveal the interplay between processing, microstructure and property, guiding the development of next-generation alloys for energy efficiency, environmental resilience and high-performance structural demands.
Research from Nature Portfolio
Development of duplex ferrite–martensite steels with alternating lamellar architectures has demonstrated Charpy impact energies of 400–450 J at tensile strengths of 1.0–1.2 GPa. Simple hot-rolling in the dual-phase regime yields controlled delamination between lamellae, dissipating crack-propagation energy and overcoming the classical strength–toughness trade-off in body-centred-cubic steels. In ultrahigh-temperature alloy design, titanium-carbide-reinforced Mo–Si–B intermetallic composites exhibit rupture lives of 400 h at 1400 °C under 137 MPa, with a stress exponent of three and an activation energy of 550 kJ mol⁻¹. Creep occurs by phase-boundary sliding between hard intermetallics and the ductile Mo solid solution, coupled with dynamic recovery in the matrix. These studies underscore how controlled phase architectures and intermetallic–carbide interactions can achieve exceptional mechanical performance under ambient and extreme conditions.
Metals and Alloy Materials publication trend
The graph below shows the total number of articles in metals and alloy materials across all publications each year (not limited to Nature Index journals).
Technical terms
Ferrite: Body-centred-cubic iron phase that offers ductility and supports precipitation strengthening.
Martensite: Supersaturated, body-centred-tetragonal phase formed by rapid cooling of austenite, characterised by high strength and hardness.
Lamellar microstructure: Alternating nanoscale layers of distinct phases that enhance toughness by crack deflection and delamination.
Creep: Time-dependent plastic deformation of a material under constant stress, significant at elevated temperatures.
Phase-boundary sliding: Mechanism by which adjacent hard and ductile phases slide past one another under load, contributing to creep deformation.
Ductile-to-brittle transition: Temperature-dependent change in fracture behaviour from plastic to brittle, critical for body-centred-cubic metals.
References
- Ultrahigh Charpy impact toughness (~450J) achieved in high strength ferrite/martensite laminated steels. Scientific Reports (2017).
- Ultrahigh-temperature tensile creep of TiC-reinforced Mo-Si-B-based alloy. Scientific Reports (2018).
- Heterogenous lamellar microstructure design to resist ductile-to-brittle transition of body-centered cubic structural metals. Materials Research Letters (2024).
- Effect of Tempforming on Strength and Toughness of Medium-Carbon Low-Alloy Steel. Materials (2023).
- Improved fracture toughness by microalloying of Fe in Ti-6Al-4V. Materials & Design (2020).
About these summaries
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