Page 10 - Mortor Fan illustrated
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ALUMINUM  Smart Developments

              Case S tudy                                                                                                          Case Study

               06 06        A8 with a Multi-material Body                                                                          07 07         NSX with a Multi-material Body

                                                                                                                                                 HONDA NSX
                            AUDI A8

                                                                                                                                                                                                              Multi-material body panels
                                                                                                                                                                                                                  Aluminum alloy sheet     Motor Fan illustrated
    Motor Fan illustrated
                                                                                                                                                                                                                  Fiber/resin compound (SMC)

             The multi-material Audi space frame                                                                                                                                                                                          ALUMINUM  Smart Developments
                 Aluminum alloy sheet                                                                                            Space frame using multi-materials
                 Aluminum extruded shapes
                                                                                                                                      Aluminum alloy sheet
                 Aluminum cast products
    ALUMINUM  Smart Developments
                                                                                                                                      Aluminum extruded shapes
                 Ultra-high tensile strength steel sheet
                                                                                                                                      3DQ ultra-high tensile strength steel tube
    10           Steel                                                                                                                Ablation cast aluminum                                                                               11
                                                                                                                                      Gravity die cast aluminum

             Audi’s new model, the A8, is a multi-material-oriented vehicle   The body panels are all-aluminum, and for the doors in   The NSX for the 21st century is not an all-aluminum body   whole structure; other materials include 13.5% of steel and
             using ultra-high tensile strength steel, mild steel, CFRP,   particular 6000 series aluminum alloys are used for both the   structure, but a multi-material space frame structure using   7.4% of resin. Structural joining techniques such as SPR
             magnesium and other materials while featuring the   inner and outer panels. For the base of the A pillars, where    aluminum, ultra-high tensile strength steel, resin and other   (self-piercing riveting), FDS (flow drill screw) and roller
             multi-material Audi space frame with aluminum as its core.   aluminum alloy sheets were used for the 2015 Audi R8, steel is   materials. Mainly high-strength extruded aluminum shapes   hemming are frequently used.
             Adoption of aluminum alloys has the special merit of providing   employed in the new Audi A8. This is thought to symbolize   are used. Aluminum alloy accounts for about 79% of the
             reliability in a lightweight and highly rigid space frame structure.   multi-materialization.

                                                                                                                                                                                         Features required for aluminum alloy  Major alloy for choice
                                                                         Through collaborative work according to the requests and                                                                               Extrusion
              Guidelines for aluminum alloy choices                      purposes of automobile manufacturers, UACJ is realizing                                                Strength Formability  resistance weldability weldability  performance
                                                                         the production of a variety of aluminum automobile parts.  Alloy evaluation                                                           & Forgeability
             The aluminum sheets typically used as body panels often include                                                                    Classification   Sheets  Panels (outer panels)                         5000/6000
                                                                                                                                                and Uses
                                                                                                                                                                    Structural parts
             non-heat-treatable 5000 series alloys and heat-treatable 6000 series     Mineo Asano                                  : Very good                      Non-structural parts                               1000/3000/5000/6000
             alloys for the reasons of strength, formability and corrosion resistance.   Manager                                   : Good                 Extruded shapes  Structural parts                            6000/7000
             As for formability, the 5000 series excels the 6000 series. The 1000     Product Engineering Division                                        Forged products  Structural parts                            6000
             series, excellent in corrosion resistance and workability, are used for   Nagoya Works                               A: Good       Alloy  Non-  1000 series  Pure aluminum    C  A  A  A     A       A
                                                                                      UACJ Corporation
             heat insulators, and the 3000 series are used for tubing. The 4000                                                   B: Standard       treatable  3000 series  Al-Mn  C B  A A   A A   A A   A A     C A
                                                                                                                                                          5000 series
             series are used for compressor wheels and the 6000 series for forged                                                 C: Inferior       Heat-  2000 series  Al-Cu     A    C      C     C     C       B
             wheels.                                                                                                                                treatable  6000 series  Al-Mg-Si  B  B    A     B     B       A
                                                                                                                                                          7000 series  Al-Zn-Mg   A    C      C     B     C       B
                                                                                                                                                                                                                       PHOTO: AUDI/HONDA
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