Is carbon and manganese responsible for dynamic strain aging phenomenon?
Best insight from top research papers
Yes, carbon and manganese play significant roles in the dynamic strain aging (DSA) phenomenon observed in various steel grades. The interaction of carbon and nitrogen with dislocations leads to serrated flow in the stress-strain curves, limiting the usability of the steel, especially in applications requiring good surface quality. Additionally, the presence of carbon-manganese ordering during aging is correlated with the static strain aging behavior in high-manganese steels. The DSA effect is clearly visible through temperature rises in self-heating tests, with a stress threshold of irreversibility emerging, indicating a distinct mechanism from classical dislocation glide. Therefore, the evidence from these studies suggests that carbon and manganese indeed contribute to the occurrence of dynamic strain aging in steel grades.
Answers from top 5 papers
More filters
| Papers (5) | Insight |
|---|---|
3 Citations | Yes, carbon and manganese are likely responsible for dynamic strain aging in Fe-Mn-Al-C lightweight steel, as examined in the study on serrated flow behavior at different temperatures and strain rates. |
| Not addressed in the paper. | |
2 Citations | Yes, carbon and manganese contribute to dynamic strain aging in high-manganese steel. The study correlates carbon-manganese ordering with strain aging behavior during deformation and aging processes. |
| Yes, carbon and nitrogen from M(C,N) and M2(C,N) carbides formed during intercritical annealing contribute to dynamic strain aging in low carbon high aluminum medium manganese steels. | |
15 Dec 2022 | Yes, carbon-manganese steels exhibit sensitivity to dynamic strain aging (DSA) phenomenon, as studied through ultrasonic fatigue testing, with DSA clearly evident in the thermal response of the steels. |
Related Questions
How does the accumulation of strain in nanomaterials differ from that in bulk materials?5 answersThe accumulation of strain in nanomaterials differs significantly from that in bulk materials due to their unique properties. Nanomaterials exhibit heterogeneous and potential-dependent strain distribution between highly coordinated facets and undercoordinated atoms, with evidence of strain propagation from the surface to the bulk of nanoparticles. Models like Williamson-Hall, Stocks-Wilson, and Debye-Scherrer are used to analyze strain in nanomaterials, emphasizing the importance of explicit modeling of nanostructures to understand the impact of strain on material properties. Nanomaterials also show rate sensitivity in dynamic plasticity, with deformation behavior influenced by strain rates and the presence of dynamic softening and hardening effects. Additionally, nanomaterials deform through mechanisms like grain boundary microsliding and stress concentration, leading to the generation of dislocations, showcasing a distinct deformation process compared to bulk materials.
How strain affect the magnism of two dimensional materials?4 answersStrain has a significant impact on the magnetism of two-dimensional (2D) materials. In the case of CrGeTe3, magneto-strain effects are observed across the ferromagnetic transition, leading to an isostructural transition and magnetocrystalline anisotropy. The in-plane lattice contraction increases the on-site Coulomb correlation between Cr atoms, resulting in band shifts, while the out-of-plane lattice contraction enhances the d-p hybridization between Cr-Ge and Cr-Te atoms, leading to band broadening and strong spin-orbit coupling in the ferromagnetic phase. Similarly, in monolayer 2H-TaSe2, mechanical strain can induce ferromagnetism under uniaxial, in-plane, tensile strain, and affect the Raman-active phonon modes. The response of 2D materials to non-uniform strain is also explored, with graphene exhibiting pseudo-magnetic fields and strain-related conversion of excitons to trions. Overall, strain provides a means to tune the magnetic and optical properties of 2D materials for various applications.
What are the effects of age on the developed material?5 answersThe effects of age on developed materials vary depending on the specific material and its properties. Aging can impact the durability, strength, mechanical behavior, and physical properties of materials. For example, in the case of composite materials used in marine applications, the fire behavior and smoke toxicity were found to be affected by aging. Physical aging of polyvinyl alcohol (PVA) hydrogel resulted in changes in microstructure, increased elasticity, and improved thermal stability. In the case of concrete and polymers, aging can lead to changes in mechanical properties, such as increased strength or decreased deformability. For superalloys, aging can cause microstructure evolution, surface oxidation, and phase transformation, which can affect mechanical performance. Aging of epoxy-based rapid tooling materials can result in a drop in mechanical properties and glass transition temperatures, mainly due to moisture uptake. Overall, aging can have significant effects on the properties and behavior of developed materials.
How does the strain rate affect the behavior of structural steel under cyclic loading?5 answersThe behavior of structural steel under cyclic loading is influenced by the strain rate. The strain rate has a distinct effect on the design criteria for end-plate connections in steel structures, particularly in regions with earthquakes in the medium range. The strain range dependence effect in structural steel members during cyclic loading has been extensively investigated, with a focus on hardening during range expansion. However, there is insufficient research on the cyclic softening behavior induced by the shrinkage of the loading range, which occurs after the peak value in seismic analysis. The microstructure evolution of dual-phase steel is affected by the strain rate, with higher strain rates hindering the transformation process from low-angle grain boundaries to high-angle grain boundaries, leading to strain localization and a decrease in mechanical stability. The mechanical properties of SS400 structural steel, such as indentation hardness, yield strength, and work hardening, are strongly influenced by the strain rate, with higher strain rates resulting in increased values. The strain rate also affects the yield strength, strain hardening exponent, and strain rate sensitivity of SS400 structural steel under cyclic loading conditions.
What are the mechanisms by which manganese affects the properties of low carbon steel?3 answersManganese affects the properties of low carbon steel through several mechanisms. Firstly, the addition of manganese to the steel during the phosphating process can improve the corrosion resistance of the coating. Secondly, manganese segregates at the interface of austenite, stabilizing the interface and preventing the transformation to twin martensite, which leads to improved ductility of the steel. Thirdly, reducing the carbon and manganese content in low-alloy pipe steels can increase the hydrogen-induced cracking resistance, attributed to a reduction in segregation structural inhomogeneity. Finally, the addition of 0.05% Nb to low carbon steel decreases the thermal and mechanical stability of reversed austenite and athermal e-martensite, resulting in changes in the microstructure and mechanical properties of the steel.
How does aging occure?3 answersAging occurs due to a combination of genetic, epigenetic, environmental, and stochastic factors that lead to molecular and cellular modifications in an organism's structure and function. These modifications can have various effects at the individual level over the course of a lifetime. There are multiple contributing factors to aging, including mutations in cells, deterioration of cells through infections, failure to eliminate harmful waste products, poisoning from external sources, and radiation damage. The accumulation of damage, both externally induced (such as DNA point mutations) and internally caused (such as DNA telomere shortening), may cause biological systems to fail and lead to aging. Additionally, cellular maintenance and repair mechanisms may gradually break down over time, allowing damage to accumulate. The exact causes of aging are still unknown, and current theories propose both the damage concept and the programmed aging concept.