17 results about "Principal element" patented technology

The invention relates to the technical field of computational simulation, in particular to a modeling method for constructing any chemical short-range ordered multi-principal element alloy structure, which comprises the following steps: setting target values and convergence conditions of chemical short-range ordered parameters; calculating parameter values of chemical short-range order parameters of the initial configuration; calculating an initial difference value; judging whether the initial difference value meets a convergence condition or not; if yes, outputting an atomic configuration; if not, carrying out iterative operation; the iterative operation process comprises the following steps of: randomly exchanging two atomic positions to obtain a new configuration; calculating a difference value between a parameter value number of the chemical short-range order parameter of the new configuration and a target value to obtain an exchanged difference value; judging whether the difference value after exchange is smaller than the difference value before exchange or not; if yes, current exchange is accepted; and after the convergence condition is met, outputting the atomic configuration. According to the method, the function of directly generating a specific structure from structural features is achieved, and atom configuration of any chemical short-range ordered feature can be customized in a wide component space.

The invention belongs to the technical field of alloys, and provides a lightweight refractory multi-principal-element alloy with excellent high-temperature creep property, and a preparation method and application thereof. The general formula of the light refractory multi-principal-element alloy with the excellent high-temperature creep property is TiaVbAlcCrdMoe, wherein 43% < = a < = 48%, 43% < = b < = 48%, 2% < = c < = 8%, 2% < = d < = 8% and 1% < = e < = 5%, a + b + c + d + e = 100%, and a, b, c, d and e are mole percentages. The alloy presents an isometric crystal structure in a complete recrystallization state in a thermal mechanical treatment state, the phase structure is a single-phase body-centered cubic BCC structure, the alloy has low density and shows excellent creep property at 650 DEG C / 100 MPa, the creep time exceeds 90 h, and the creep elongation is lower than 10%.

The invention relates to the technical field of alloy materials, and particularly discloses a multi-principal-element alloy added with interstitial atoms and a preparation method of the multi-principal-element alloy. The invention relates to a multi-principal element alloy added with interstitial atoms, which is characterized by consisting of 99.7 to 99.9 weight percent of CoNiCrMo alloy matrix and 0.1 to 0.3 weight percent of nitrogen element, the CoNiCrMo alloy matrix comprises the following components in percentage by element atoms: 33-37 at% of Co, 10-30 at% of Ni, 10-30 at% of Mo, and the balance of CoNiCrMo. Ni is equal to 33 to 37 at%; cr is equal to 18 to 22 at%; and Mo = 7-11 at%. The strength of the alloy is improved in an interstitial atom solution strengthening and cold rolling deformation mode, the FCC phase structure is stabilized through interstitial N atoms, the good plasticity of the alloy is kept while the strength of the alloy is improved, then the strength of the alloy is improved through cold rolling deformation, the strength and plasticity of the alloy are balanced, and the strength and plasticity of the alloy are improved. And the practical application of the alloy in a low-temperature environment is facilitated.

The invention belongs to the technical field of damping alloys, and particularly relates to an iron-containing damping alloy component design method based on entropy regulation and control. The invention discloses a design method of an iron-containing damping alloy based on entropy regulation and control. The design method comprises the following steps: selecting principal elements Fe, Cr, Mn, Co, Ni, Ti, Cu, Al, Mo and RE; the element molar content of Fe-Cr-Ni-X is used as a variable, X is one or more elements except Fe, Cr and Ni, the mixed entropy () and the valence electron concentration (VEC) of the alloy are calculated, and when R of the alloy is larger than or equal to 1.25, and VEC is larger than or equal to 7.15 and smaller than or equal to 7.95, the damping performance Q-1 of the alloy is larger than or equal to 0.02. According to the design method of the high-entropy damping alloy, the types and the content of elements in the alloy are adjusted according to the entropy value and the valence electron concentration of the alloy, and therefore the iron-containing high-entropy damping alloy with the high damping performance is obtained. And the component design efficiency of the iron-containing high-entropy damping alloy is improved, and the alloy development period is shortened.

The invention discloses a refractory multi-principal element alloy with excellent tensile property and a preparation method and application thereof. The invention belongs to the field of alloy materials. The technical problem that in the prior art, the strength and plasticity of the multi-principal-element alloy cannot be achieved at the same time is solved. The refractory multi-principal-element alloy with the excellent tensile property is prepared from main elements including Ti, Zr, Nb, Mo and Hf, the alloy prepared according to the formula proportion has excellent tensile yield strength and elongation at break, the yield strength of the prepared alloy exceeds 1 GPa, and the elongation at break exceeds 10%. The refractory multi-principal element alloy is a single-phase BCC alloy all the time, the tensile yield strength of the alloy is kept in a stable state along with addition of the Hf element within the protection range of the refractory multi-principal element alloy, and the elongation at break can be gradually increased. The alloy prepared by the invention also has the characteristic of small density, and can be better applied to the field of aerospace.

The invention relates to the technical field of high-temperature alloys, in particular to an additive manufacturing high-temperature alloy product with excellent high-temperature strength and plasticity and a preparation method thereof, and the alloy product comprises the following components in percentage by mass: 10%-18% of Cr, 23.1%-28% of Co, 3.6%-6% of Mo, 1.9%-6% of W, 1%-3% of Al, 1.5%-4.75% of Ti, 1.01%-3% of Nb, 0%-5% of Ta, 0%-8% of Fe, 0.01%-0.5% of C, 0%-0.05% of B, 0%-0.2% of Zr, 0%-0.5% of O, 0-0.2% of N and the balance of Ni. By controlling the content of main elements, the problems of poor printability, poor high-temperature creep resistance, poor high-temperature strength and plasticity and difficulty in balancing each index are solved.

The invention provides a high-toughness NbxTiyVmZrn series refractory multi-principal element alloy and a preparation method thereof. The NbxTiyVmZrn series refractory multi-principal element alloy comprises the following chemical components: Nb: x is more than or equal to 0.05 and less than or equal to 0.10 at%; ti: 0.35 < = y < = 0.40 at%; v: 0.35 < = m < = 0.4 at%; zr: 0.15 < = n < = 0.2 at%, and x + y + m + n = 1, the problems that traditional refractory alloy is poor in plasticity and large in brittleness are solved, the yield strength of the prepared refractory multi-principal-element alloy at the room temperature can reach 1500 MPa or above, the strain rate is close to 25%, and the refractory multi-principal-element alloy is expected to be applied to the field of high-temperature materials. The preparation method of the alloy is simple and easy to implement, and has the condition for realizing batch production.

The invention discloses a multi-principal-element low-modulus Ti-Zr-based medium-entropy alloy and a preparation method thereof, the multi-principal-element low-modulus Ti-Zr-based medium-entropy alloy comprises the following components according to atomic percent: (TiZr) 100-10 * Nb < 4 > * Ta < 4 > * Hf < 2 > *, and x is greater than or equal to 1 and less than or equal to 4. Based on the synergistic effect of the TiZr alloy and the Hf, Nb and Ta alloy, by controlling the alloy molar ratio of the TiZr alloy and the Hf, Nb and Ta alloy, the mixed entropy and valence electron concentration of the alloy are improved, the beta-phase forming ability is enhanced, the elastic modulus of the alloy is reduced, the ductility of the alloy is improved, and therefore the application scene of the alloy material is expanded.

The application discloses a multi-principal-element low-modulus Ti-Zr-based medium-entropy alloy and a preparation method thereof. 100‑ 10x Nb 4x Ta 4x Hf 2x Wherein, 1<=x<=4. The application is based on the synergistic effect between the TiZr alloy and the Hf, Nb and Ta alloys, the alloy molar ratio between the two is controlled, the mixed entropy and the valence electron concentration of the alloy are improved, the beta phase forming ability is enhanced, the elastic modulus of the alloy is reduced, and the ductility of the alloy is improved, so that the application scenarios of the alloy material are expanded.

An outlet element (1) for a sanitary fitting is provided, which outlet element (1) has a main element (2) and a valve device (3) which is connected to the main element (2) and can be adjusted relative to the main element (2) between at least two switching positions in order to switch over between at least two separate water conduits (4, 5). In order for it to be possible for the outlet element (1) to be fixed to an outlet of a sanitary fitting in as simple a way as possible, the outlet element (1) has a threaded coupling (13) with an external thread (19), the threaded coupling (13) being formed on the main element (2).

Disclosed is a multi-principal element Al—Co—Cr—Cu—Fe—Ni high-entropy alloy (HEA) coating. The multi-principal element Al—Co—Cr—Cu—Fe—Ni HEA coating includes metal elements Al, Cu, Co, Cr, Fe, and Ni in a molar ratio of Al:Cu:Co:Cr:Fe:Ni of 0.7:0.3:1:1:1:1. Raw materials for Al and Cu are metal powders. A raw material for Co, Cr, Fe, and Ni is a CoCrFeNi alloy powder. A molar ratio of Co, Cr, Fe, and Ni in the CoCrFeNi alloy powder is 1:1:1.

The present invention provides a low-activation high-entropy alloy with a molecular formula of Fe a Cr b V c W d Mn e ; wherein, a, b, c, d, and e respectively represent the atomic percentages of the corresponding elements, and satisfy the following conditions: 30 ≤ a ≤ 35, 30 ≤ b ≤ 35, 10 ≤ c ≤ 15, 10 ≤ d ≤ 15, 5 ≤ e ≤ 10, and a + b + c + d + e = 100. The present invention provides a machine learning-based design method for the above alloy. The high-entropy alloy of the present invention has low-activation characteristics, a BCC phase structure, and high hardness; at the same time, the machine learning-based design method constructed by the present invention can synchronously, quickly, and accurately design new multi-principal element alloys according to structural and performance requirements, thereby avoiding the blindness of the traditional experimental trial-and-error method and significantly improving the design and research and development efficiency of new materials.

The invention relates to the technical field of brazing, in particular to Ag-Al-Cu-In-Sm-Ti multi-principal-element eutectic brazing filler metal as well as a preparation method and application of the Ag-Al-Cu-In-Sm-Ti multi-principal-element eutectic brazing filler metal. The Ag-Al-Cu-In-Sm-Ti multi-principal element eutectic brazing filler metal comprises the following components in percentage by atom: 68.5% to 72.5% of Ag, 8.5% to 12.5% of Al, 7.5% to 10.8% of Cu, 4.5% to 10% of In, 1.5% to 3.0% of Sm and 2.0% to 2.8% of Ti. According to the method, the design thought of multiple principal elements and eutectic components is combined, good matching of the brazing filler metal welding temperature and the mechanical property is achieved, the welding temperature is lowered, and the joint strength is improved; meanwhile, device performance degradation or failure caused by resistivity increase in the long-term service process can be reduced, and the durability of the connector in the high-temperature environment can be improved through the diffusion hysteresis effect of the multi-principal-element alloy. And the preparation process is simple.

The invention discloses a high-strength heat-resistant Nb < x > Ti < y > V < m > Zr < n > series refractory multi-principal-element alloy, and belongs to the technical field of alloy casting. Ti: 0.55 < = y < = 0.60 at%; v: 0.00 < = m < = 0.05 at%; zr: 0.10 < = n < = 0.15 at%. X + y + m + n = 1, the prepared refractory multi-principal-element alloy has the advantage of high strength of a single BCC phase structure, the microhardness reaches 450 HV or above, and the refractory multi-principal-element alloy has good thermal stability within the temperature range of 1450 DEG C or below. The problems that the refractory multi-principal-element alloy is poor in thermal stability in a medium-temperature interval and the mechanical property is reduced are solved, and the refractory multi-principal-element alloy has a good development prospect in the application field with the high strength requirement and the good thermal stability.

The invention discloses a wire rod for a high-strength lifting round-link chain. The wire rod comprises the following main elements in percentage by mass: 0.21% < = omega [C] < = 0.26%, 0.10% < = omega [Si] < = 0.30%, 1.00% < = omega [Mn] < = 1.30%, 0.40% < = omega [Cr] < = 0.60%, 0.60% < = omega [Ni] < = 0.90%, omega [Cu] < = 0.10%, 0.20% < = omega [Mo] < = 0.40%, 0.025% < = omega [Al] < = 0.050%, omega [O] < = 0.0020%, omega [N] < = 0.0070%, omega [H] < = 0.0001%, omega [P] < = 0.015%, omega [S] < = 0.010% and 0.001% < The steel wire rod has the advantages that the steel wire rod has a high spheroidizing rate and proper annealing hardness and hardness dispersion difference, the toughness is high after quenching and tempering, and the comprehensive performance is excellent.

The application provides a eutectic multi-component alloy design method based on a binary phase diagram and a natural mixing criterion, and belongs to the technical and preparation fields of alloy materials. The method is as follows: firstly, a eutectic point of base elements and added elements is determined through an alloy phase diagram. The eutectic composition point is proportioned, a cast state organization after arc melting is cut, EDS analysis is carried out, the composition of different eutectic regions is weighted and averaged, and the element content of the eutectic region, that is, the element content of the eutectic multi-component alloy in the cast state, is obtained. The application overcomes the difficulty of finding the eutectic point in the multi-component phase diagram, and secondly, the eutectic point of the multi-component alloy does not need to be determined by the calculation simulation of the thermodynamic data software and the trial-and-error method for multiple times; by introducing the mathematical weighted average method, the experimental errors caused by the defects of the selected region organization, element segregation and the like can be effectively eliminated, and the performance in the cast state can be further improved.

A high strength and wear resistant multi-element copper alloy is disclosed. The multi-element copper alloy consists of six principal elements and at least one additive element, in which the six principal elements are 97 to 98.5 atomic percent Cu, at most 0.1 atomic percent Al, 0.2 to 0.45 atomic percent Ni, 0.1 to 0.3 atomic percent Si, 0.15 to 0.45 atomic percent V, and 0 to 0.3 atomic percent Nb, and the at least one additive element is selected from a group consisting of Sn, Fe, Mn, Mg, C, P, and B. Moreover, experimental data have proved that, this multi-element copper alloy has a wear resistance greater than 475 m / mm3 after being subjected to a homogenization process at 900 degrees Celsius for 6 hours and an age hardening process at 450 degrees Celsius for 50 hours.