Temat: composite piston - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dilatometric researches of novel alloy for combustion engine pistons
Autorzy:: Żurek, J.
Slawinski, Z.
Jankowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/243032.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine piston
composite alloy
piston sample elongation
hysteresis
piston clearance
Opis:: The article presents dilatometric research results of composite alloy (in-situ) for combustion engines piston. Researches were performed with a precise dilatometer. Alloy's research test stand and test results including relative elongation, course of derivative of dimension increasing versus time with phase transition and course of coefficient of linear thermal expansion α for composite alloy versus temperature are presented in the article. Novel composite alloy allows getting a minimum difference of the coefficient of linear thermal expansion α during heating and cooling. In particular, the chemical composition of the novel composite silumin alloys; ATD of standard alloy – silumin Ak12 and novel composite alloy; schema of research stand and view of the measuring-head of the extension; course of the coefficient of linear thermal expansion α versus temperature during heating and cooling for the standard alloy and novel composite alloy; course of the relative piston elongation ΔL/Lo versus temperature during heating and cooling for the standard alloy and novel composite alloy; course of the derived function of the extension in relation to time dL/dt versus temperature for the standard alloy on pistons and novel composite alloy; course of the relative elongation in function of time during ageing of composite alloy at the temperature of 200°C with two-stage ageing process; course of the relative elongation in function of time during ageing of composite alloy at the temperature of 200°C for the first stage and second stage are presented in the article.
Źródło:: Journal of KONES; 2016, 23, 3; 585-596
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: High-quality silumin on pistons of combustion engines
Autorzy:: Jankowski, A.
Pietrowski, S.
Sieminska, B.
Szymczak, T.
Powiązania:: https://bibliotekanauki.pl/articles/245889.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
piston
composite alloys
heat treatment
thermal expansion
hysteresis
Opis:: In the paper the test results are presented for the AlSH2Cu5Ni5MgO.5CrO.05MoO.05WO.05VO.05 newly worked out silumin close to eutectic piston-silumin with the elevated content ofcopper and nickel to approx. 5% with relation to generally applied the AISH2 piston silumin. The novel silumin contains also Cr, Mo, In and V micro alloy additions in quantity approx. 0.05 percent for every element. Research of microstructure, HB hardness and coefficient of lineal thermal expansion a for the AlSil2Cu5Ni5MgO.5CrO.05MoO.05WO.05VO.05 silumin in the cast state, after the separation strengthening and additional short duration high-temperature heat-treatment were performed. Research of the microstructure of the AlSH2Cu5Ni5MgO.5CrO.05MoO.05WO.05VO.05 silumin showed the occurrence in it following constituent phases: alfa(Al), beta(Si), Al2Cu and AlMoCrWVMgNiSiCuFe. The separation strengthening brought about the coagulation of silicon emissions. The short duration high-temperature heat-treatment caused additional coagulation of silicon emissions and also its coalescence. Measurement of the HB hardness showed high hardness investigated alloy in the rough state, approx. 30% higher from the AlSi2 piston silumin. Measurement of the a coefficient of thermal expansion showed beneficial effects of novel alloy connected with the value decreasing of this coefficient as well so called hysteresis. Further studies on novel alloy will concentrate on alloy-additional and processes of the heat treatment.
Źródło:: Journal of KONES; 2009, 16, 4; 563-573
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Some problems pistons made from composite materials with small hysteresis to combustion engines
Autorzy:: Jankowska-Sieminska, B.
Powiązania:: https://bibliotekanauki.pl/articles/245555.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
combustion engine piston
composite alloys
thermal expansion
hysteresis
Opis:: Novel composite ma hysteresisterials on the pistons are characterised that they occur in them multiple intermetallic phases which crystallize in the high temperature, before crystallization of the alfa+beta (Al+Si) eutectic. For forming of pre-eutectic phases, chromium and molybdenum are introduced to silumins, and for derivation of multiple increased concentration of nickel and copper and decreased concentration of magnesium are accomplished. On the basis of evaluations of mechanical and thermal loads of combustion engines pistons applying essence of composite materials of combustion engines pistons, as well requirements for combustion engines pistons, especially high loaded engines are expressed. Test results of hardness, influence of temperature of casting, test results of mechanical properties, friction coefficient and coefficient of thermal expansion are presented in the paper. The special attention devoted to so called hysteresis coefficient of thermal expansion and hysteresis of the relative elongation in function temperature and time. Courses of coefficient of thermal expansion for standard and composite material are presented. Differences of the a coefficient during heating and cooling in function temperature are relative to kind of heat treatment. Two-stage heat treatment is beneficial for the obtainment small values of the a coefficient.
Źródło:: Journal of KONES; 2011, 18, 3; 123-128
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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