Thermotech AL-DATA INFORMATION

Transcription

1 Thermotech AL-DATA INFORMATION N.SAUNDERS THERMOTECH LTD, SURREY TECHNOLOGY CENTRE 40 OCCAM RD, THE SURREY RESEARCH PARK GUILDFORD, SURREY GU2 7YG, U.K.

2 AL-DATA (VER.8) Thermotech has developed a database that can be generally used for commercial Al-alloys of all major types ranging from commercially pure Al to the complex 7000 series alloys such as Al-DATA contains the following elements Al-B-Bi-C-Ca-Co-Cr-Cu-Fe-H-La-Mg-Li-Mn-Mo-Ni-Pb-Sc-Si-Sn-Sr-Ti-V-Zn-Zr With data for the following phases taken into account Al(fcc), Liquid, Si, Graphite, GAS, hcp_a3, Sn(bct_a5), Bi(rhomb_A7), Al 4 C 3, Al 13 Co 4 Al 7 Cr, Al 2 Cu, Al 3 (Fe,Mn,Ni...), Al 3 Mg 2 Al 6 (Mn,Fe,Cu...), Al 3 Ni, Al 3 (Ni,Cu) 2, Al 4 (Ca,Sr), Al 3 M_D022, Al 3 M_D023, Al 3 M_L12, Al 3 RE_D019, Al 11 RE 3, Mg 2 (Pb,Sn), Mg 2 Si, MgZn 2 SiC, (Al,Ti)B 2, MC_carbide, Al 18 (Cr,Mn) 2 Mg 3, Al 13 Cr 4 Si 4, Al 7 Cu 2 (Co,Fe), Al 2 CuMg Al 20 Cu 2 Mn 3, Al 7 Cu 4 Ni, Al 9 (Co,Fe,Ni) 2, AlFeSi, AlFeSi, Al(Fe,Mn,...)Si, Al 2 Mg 3 Zn 3 Al 2 Si 2 (Ca,Sr), Al 4 SiC 4, Al 8 SiC 7, Al 5 Cu 2 Mg 8 Si 6, Al 8 FeMg 3 Si 6, AlFeMoSi, _BiPb AlLi, TB_AlCuLi, T1_AlCuLi, R_AlCuLi, _AlLiMg, AlLiSi SOME COMMENTS ON THE MODELLING The Liquid and FCC_A1 phases are modelled as substitutional mixing phases with the FCC_A1 phase corresponding to the Al-rich solid solution. The other phases are often stoichiometric with respect to at least one element although a number of other elements may mix in the phase. The nomenclature surrounding the various intermetallic phases can differ depending on which reference text is used as a basis. To help the user, the various intermetallics are described below with the phase names as given in Al-DATA. The addition of Bi, Pb and Sn can cause the formation of a liquid phase rich in Bi and/or Pb and/or Sn that solidifies at low temperatures to Bi and/or Pb and/or Sn. Miscibility gap settings have been automatically set such that if Pb is input as an element a second FCC phase is created with Pb as the major constituent. As well if Bi, Pb or Sn are input a second liquid phase is created. Testing shows the automatic procedure works well, but care should be taken if Bi, Pb or Sn are input in the alloy composition. Al 13 Co 4 This is the most Al-rich intermetallic phase from the Al-Co system. Al 7 Cr This is the most Al-rich intermetallic phase from the Al-Cr system. It is sometimes also known as Al 13 Cr 2. In the present model Fe and Mn can substitute for Cr. Al 2 Cu This is often known as and the modelling includes some limited solubility for Si and Zn. Al 3 Fe This is sometimes known as Al 13 Fe 4. The present model includes solubility for Co,Cr,Cu,Mn,Ni, Si and V

3 AlLi This is the stable intermetallic that is formed as Li is added to Al. Al 3 Mg 2 This is the most Al-rich intermetallic in the Al-Mg system, which is sometimes known as the phase. In the present model some limited solubility for Cu and Zn is included. Al 6 Mn In the present model solubility for Cr,Cu,Fe and Mg is taken into account in Al 6 Mn. This phase also corresponds to the most Al-rich ternary phase in Al-Cu-Fe sometimes called. Al 3 Ni and Al 3 Ni 2 These phases are the two most Al-rich intermetallics in the Al-Ni system. Al 3 Ni 2 takes up large amounts of Cu and comes into equilibrium with Al in the ternary system Al-Cu-Ni. Al 4 (Ca,Sr) This is the most Al-rich intermetallic in the Al-Sr and Al-Ca systems and is treated as a stoichiometric phase. Al 3 M phases These are trialuminides that compete for stability in Al-alloys with additions of Li, Sc, Ti, V and Zr. Al 3 M_D022 is the stable form in Al-(Ti,V) and Al 3 M_D023 is stable in Al-Zr. Al 3 M_L12 is the stable phase in Al-Sc but is an important metastable phase in Al-Li based alloys. Al 3 RE_D019 and Al 11 RE 3 phases Al 3 Re_D019 is the trialuminide formed with the addition of La. Al 11 RE 3 is the Al 11 La 3 phase. Mg 2 (Pb,Sn) This is the Mg 2 X phase formed in the Mg-P and Mg-Sn binary systems with the C1 structure Mg 2 Si This is taken as stoichiometric Mg 2 Si. MgZn 2 The modelling of this phase is quite complex and it is important in the Al-Cu-Mg-Zn quaternary system. It is a Laves type and is sometimes called. It also exists in the Cu-Mg binary as Cu 2 Mg and in the ternary Al-Cu-Mg system as AlCuMg. It forms a solid solution in the quaternary Al-Cu-Mg-Zn system. E_AlCrMgMn This is a ternary phase which exists both in the Al-Cr-Mg system Al 18 Cr 2 Mg 3, where it is sometimes known as the E phase, and in the Al-Cr-Mn system, where it is sometimes known as the G or T phase. There is a solid solution in the quaternary system Al-Cr-Mg-Mn. Al 13 Cr 4 Si 4 This is a ternary phase which exists in the Al-Cr-Si system where it is sometimes called. It is

4 Al 7 Cu 2 M This is the ternary Al 7 Cu 2 Fe phase from the Al-Cu-Fe system, where it also known as the or N phase. It contains solubility for Co. Al 2 CuMg This a ternary phase from the Al-Cu-Mg system where it is also known as the S phase. It is Al 20 Cu 2 Mn 3 This a ternary phase from the Al-Cu-Mn systems where it is also known as the phase. It is Al 7 Cu 4 Ni This a ternary phase from the Al-Cu-Ni systems where it is also known as the T phase. It is Al 9 M 2 This an intermediate phase from the Al-Fe-Co-Ni system where it is also known as the phase. It is modelled as a two sublattice phase with Al on one sublattice and Co, Fe and Ni mixing on the other. AlFeSi This is the stable form of the phase in the Al-Fe-Si system with a hexagonal structure. It has various chemical formulas attached to it such as Al 8 Fe 2 Si, Al 12 Fe 3 Si 2 or Al 15 Fe 6 Si 5 In the present model it has been taken as stoichiometric with a composition close to Al 8 Fe 2 Si. This phase is a stable ternary phase in Al-Mn-Si with a cubic structure. Fe extensively substitutes for Mn and it was at one time thought that the cubic form was the structure of AlFeSi. However, it has since been shown that it forms in Al-Fe-Si alloys only when impurity elements such as Mn are present. Al and Si mix quite extensively and this has been take into account in the modelling. As well as Fe, the elements Cr, Cu and V substitute for Mn in the present model. The phase is also known as Al(FeMn)Si. AlFeSi This is a ternary phase in the Al-Fe-Si system. It is also known as Al 5 FeSi, Al 9 Fe 2 Si 2. It is modelled as a stoichiometric compound with the formula Al 9 Fe 2 Si 2. AlFeMoSi This is a quaternary phase from the Al-Fe-Mo-Si system. It is modelled with some substitution between Fe, Mo and Mn. Al 2 Mg 3 Zn 3 This is a phase that exists as a ternary compound in both the Al-Mg-Zn and Al-Cu-Mg system. In the Al-Cu-Mg system it has a stoichiometry close to Al 6 CuMg 4. It is also known as the T phase. It has been modelled using a three sublattice model with Mg occupying one sublattice and Cu,Zn and Al the other two.

5 TB_AlCuLi, T1_AlCuLi, R_AlCuLi, _AlLiMg AlLiSi These are various ternary phases that are reported to form in the ternary systems Al-Cu-Li, Al-Mg-Li and Al-Si-Li. Al 2 Si 2 (Ca,Sr) This is a ternary phase in the Al-Si-Ca and Al-Si-Ca ternary systems. Al 8 FeMg 3 Si 6 This is a quaternary phase from the Al-Fe-Mg-Si system and it is also known as the, Q or h phase. It is Al 5 Cu 2 Mg 8 Si 6 This is a quaternary phase from the Al-Cu-Mg-Si system and it is also known as the Q, or h phase. It is Al 4 C 3, SiC, Al 4 SiC 4, Al 8 SiC 7 These are the stable carbides from the Al-C, Si-C and Al-Si-C systems. MC_Carbide This is basically TiC but has solubility of V and Zr allowed. MB 2 This is the TiB 2 phase with potential solubility extension of Zr and V included. AlB2 AlB 2 is _BiPb This is an intermetallic phase which may form if both Bi and Pb are included in an alloy. GAS The gas phase contains Hydrogen.