Properties and application of aluminum alloys in automotive industry

Import 22/07/2015Tato bakalářská práce je zaměřena na hliníkové slitiny a jejich použití v automobilovém průmyslu. V teoretické části této práce jsou popsány jednotlivé slitiny Al, jejich vlastnosti, použití a předpokládaný vývoj užití pro další desetiletí. Pro praktickou část této práce byla vybrána rozeta vyrobena z materiálu AW 7075, bylo provedeno ověření shody materiálu s příslušnou normou ČSN EN 573 a byla pozorována mikrostruktura tohoto materiálu.The aim of this bachelor thesis is to describe the use of aluminium alloy in automotive. Theoretical part covers the detailed description of each alloy along with their qualities and expected usage for near future. For practical part I have chosen a sprocket made from AW 7075 material. A verification check for the material unity has been performed according to quota ČSN EN 573. Microstructure of the substance was monitored.636 - Katedra materiálového inženýrstvívýborn

Predawn water potentials at approximately the mid-point (day 71) and the end (day 100) of the dry-down period and 35 days after resuming the watering regime (day 135).

<p>Error bars reflect one standard error of the mean. The p-values of statistically significant or marginally significant effects are summarized by species in each panel. Letter symbols stand for the effects of harvest date (H), fertilizer (F), competition (C) and their interactions (H*C, F*C). Where there is no error bar only one measurement could be obtained. Missing values indicate the absence of live leaf area. At water potential values below the dotted line at– 2MPa, gas exchange is severely restricted by stomatal conductance based on <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0176042#pone.0176042.s001" target="_blank">S1 Fig</a>.</p

Competitive effects (<i>log CE</i>, dashed lines) and responses (<i>log CR</i>, solid lines) of Johnsongrass.

<p>Positive values indicate reduced non-root biomass relative to single plants. Solid symbols for high fertilizer, open symbols for low fertilizer. The shaded area indicates the period over which water was withheld. Error bars reflect one standard error of the mean.</p

Competitive effect and response of Johnsongrass on focal plants examined by ANOVA.

<p>Johnsongrass as focal plant was omitted from this analysis to focus on interspecific competition. Significant effects are highlighted in bold lettering.</p

Growth dynamics of the four study species grown as single plants.

<p>A: Log of total biomass over five harvest dates. Shown in the panel are the p-values of all statistically significant effects, including harvest date (H), species (S), fertilizer (F) and a harvest date x species interaction (H*S). B: Relative growth rates for the interval between two consecutive harvests, standardized to a daily relative growth rate. Solid symbols for the higher fertilizer level, open symbols for the lower level. Error bars reflect one standard error of the mean.</p

Total nitrogen content and nitrogen concentration in above-ground biomass at first harvest.

<p>Error bars reflect one standard error of the mean. The p-values of statistically significant or marginally significant effects are summarized by species in each panel. Letter symbols stand for the effects of fertilizer (F), competition (C) and their interaction (F*C).</p