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Showing 1 to 15 of 15 for “"microhardness testing"”.
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Effect of surface hardening conditions on susceptibility of fasteners to hydrogen embrittlement
… load and incremental step load embrittlement testing techniques, the susceptibility of case hardened steel tapping screws to internal and environmental hydrogen embrittlement is examined. Further characterization of the fastener samples through microhardness testing, microstructure review, and …
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Indentation testing of composite materials: a novel approach to measuring interfacial characteristics and engineering properties
Findings made through the indentation testing of composites are presented in this thesis. The concept was developed as an attempt to evaluate the interfacial shear strength at a mesolevel, possibly overcoming the deficiencies of present techniques. Vickers Microhardness Testing and Continuous Ball …
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In Vitro Study Comparing Treatments for Incipient Enamel Lesion Remineralization
… were prepared, frozen, and subjected to baseline microhardness testing. Samples were randomized into four groups (n=5/group): Icon, FV, SDF, and a control group. Artificial caries lesions were induced and treated per manufacturers’ instructions. Samples were immersed in a saliva-like …
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Effect of silicon carbide (SiC) on mechanical and physical properties of solid state recycled aluminium aa6061 by using hot extrusion method
… Strength (UTS), Elongation to Failure (ETF) and Microhardness (MH). The best parameter setting for the extrusion was found to be at T=550°C, t=1 hour and SiC=5 wt.%. This parameter resulted in UTS=18022 MPa, ETF=18.07%, MH=71.52Hv, and Density=2.73 g/cm3. Based on RSM, with desirability of …
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The Applicability of Additive Friction Stir Deposition for Bridge Repair
… was studied using scanning electron microscopy, microhardness testing, and three-point bending. Results from these tests indicated the following: AFSD can sufficiently mix dissimilar steels and result in a fine-grained microstructure; depositing onto a rough surface appeared to aid bonding …
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Effect of the GentleWave System on dentin microhardness and sealer penetration: an in vitro study
… from the apex. Assessment methods included microhardness testing and scanning electron microscopy (SEM). Vickers Test results revealed significant differences in hardness values, with Group C exhibiting the highest and Group T the lowest values. In terms of sealer penetration, Group G …
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Microstructural evolution of AISI304 stainless steel in the Steckel Mill rolling process
… variations in the strip. This was done with microhardness testing, conventional optical microscopy and electron backscatter diffraction. The middle section of the strip demonstrated full recrystallization whereas the head and tail sections demonstrated no signs of recrystallization. The …
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The Effect of Co on the Deformation Response of Fe-Mn Alloys
… diffraction, scanning electron microscopy, and microhardness testing were used for evaluation. It is seen that Co has a somewhat complicated effect on the deformation behavior of Fe-Mn alloys. In all alloys, 𝛾→𝜀 martensitic transformation occurs. At concentration below 8 at. % Co, increased 𝛼′ …
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An Iron Age in the Philippines?: A Critical Examination
… collection were examined metallographically. Microhardness testing was done for qualitative and quantitative analysis. Descriptive and exploratory statistics were used to construct a generalized typology. The Guthe collection showed treatment variability in morphology, metallurgical treatment …
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Effects of vanadium microalloying of 1080 steel on pearlite transformation kinetics and microstructural development
… the influence of V in 1080 steel. Vickers microhardness testing was employed to examine the effect of the V addition on hardness. V partitioning/precipitation was analyzed through atom probe tomography (APT). Isothermal heat treatments were conducted with a focus on achieving isothermal …
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Irradiation effects on geopolymer and additively manufactured 316H stainless steel and porosity in equine hoof wall
… the geopolymer showed a 90% increase in microhardness, a 46% rise in reduced modulus, and a 23% decrease in contact depth. Surface cracking was observed, attributed to ion implantation and reduced water content, highlighting its potential for shielding applications with further …
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Technological, social and economic aspects of gold production and use by the iron age people of Southern Africa
… the naked eye, microscopy of the surfaces, and microhardness testing and metallography of selected polished samples. Fifty eight specimens were studied from Mapungubwe, two hundred and sixty eight pieces from Great Zimbabwe and fifteen from Thulamela. Trade and socio-economic effects of southern …
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Surface Engineering of Zirconium for Tribological Properties Enhancement
… engineered CP-Zr have been characterised by microhardness testing, scratch testing, and tribological testing under both dry, unlubricated and simulated body fluids (Ringer’s solution) conditions. The results show that TO is a very effective surface engineering technique to enhance the …
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Recrystallization and Grain Growth in a Copper Alumina Oxide
Made available in DSpace on 2017-07-06T18:48:21Z (GMT). No. of bitstreams: 3 Hamilton_Roger_J_MS.pdf: 25658402 bytes, checksum: d66f2f28f19e9a864517308e4c32f0b1 (MD5) Hamilton_Roger_J_MS_ABS.pdf: 526787 bytes, checksum: 4be32673ee6a5420663ac7c230b4c904 (MD5) license.txt: 4813 bytes, checksum: …
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Interfacial and Physical Confinement Effects on the Structure and Properties of Aligned Carbon Nanotube Architectures
… pull-off from the flat substrate via tensile testing, shows that the array fails progressively, similar to microfiber bundles in tension, and in particular evolves non-monotonically with Tₚ with three regimes identified: first increasing from an as-grown strength of ∼0.04 MPa to ∼0.13 MPa up …