A plasticizing device includes a first member having a groove portion that has a spiral shape extending to a center, a motor that rotates the first member, a second member that faces the first member, and a heating unit for heating a material that is transported along the groove portion, the first member having a plurality of recessed portions on a bottom surface of the groove portion. By providing a plurality of recessed portions on the bottom surface of the first member through which the material flows, the rotational force of the rotating first member is easily transmitted to the material and the amount of material flowing in the first member can be increased.

A plasticizing device includes a first member having a groove portion that has a spiral shape extending to a center, a motor that rotates the first member, a second member that faces the first member, and a heating unit for heating a material that is transported along the groove portion, the first member having a plurality of recessed portions on a bottom surface of the groove portion. By providing a plurality of recessed portions on the bottom surface of the first member through which the material flows, the rotational force of the rotating first member is easily transmitted to the material and the amount of material flowing in the first member can be increased.

An aluminum alloy material including 1.2 atom % or more and 6.5 atom % or less of Fe, and 0.005 atom % or more and less than 0.15 atom % of one or more elements selected from the group consisting of Nd, W, and Sc, with the balance being Al and unavoidable impurities.

An aluminum alloy material including 1.2 atom % or more and 6.5 atom % or less of Fe, and 0.005 atom % or more and less than 0.15 atom % of one or more elements selected from the group consisting of Nd, W, and Sc, with the balance being Al and unavoidable impurities.

A three-dimensional shaping apparatus includes a stage, a material supply unit that supplies a material containing an inorganic powder and a binder, a laser, and a control unit, and the control unit performs a process of supplying the material onto the stage by controlling the material supply unit, and a process of irradiating the material on the stage with a laser beam with an energy density of 140 J/mm.sup.3 or more by controlling the laser.

A three-dimensional shaping apparatus includes a stage, a material supply unit that supplies a material containing an inorganic powder and a binder, a laser, and a control unit, and the control unit performs a process of supplying the material onto the stage by controlling the material supply unit, and a process of irradiating the material on the stage with a laser beam with an energy density of 140 J/mm.sup.3 or more by controlling the laser.

A three-dimensional shaping apparatus includes a stage, a first material supply unit that supplies a first material, a second material supply unit that supplies a second material having a thermal expansion coefficient larger than a thermal expansion coefficient of the first material, a laser irradiation unit, and a control unit that controls the laser irradiation unit by selecting a first laser irradiation mode and a second laser irradiation mode in which heat diffusion to an adjacent region is smaller than in the first laser irradiation mode, wherein when a first material region and a second material region are adjacently disposed in the shaped layer for one layer, and the second material region is irradiated with a laser from the laser irradiation unit, the second laser irradiation mode is selected for a region adjacent to the first material region.

A three-dimensional shaping apparatus includes a stage, a first material supply unit that supplies a first material, a second material supply unit that supplies a second material having a thermal expansion coefficient larger than a thermal expansion coefficient of the first material, a laser irradiation unit, and a control unit that controls the laser irradiation unit by selecting a first laser irradiation mode and a second laser irradiation mode in which heat diffusion to an adjacent region is smaller than in the first laser irradiation mode, wherein when a first material region and a second material region are adjacently disposed in the shaped layer for one layer, and the second material region is irradiated with a laser from the laser irradiation unit, the second laser irradiation mode is selected for a region adjacent to the first material region.

A three-dimensional shaping apparatus includes a stage, a first material supply unit that supplies a first material, a second material supply unit that supplies a second material, a laser irradiation unit, and a control unit that controls the laser irradiation unit separately between a first laser irradiation scan and a second laser irradiation scan, wherein when a first material region and a second material region are adjacently disposed in the shaped layer for one layer, the control unit irradiates the first material region with a laser in the first laser irradiation scan, and irradiates the second material region with a laser in the second laser irradiation scan.

A three-dimensional shaping apparatus includes a stage, a first material supply unit that supplies a first material, a second material supply unit that supplies a second material, a laser irradiation unit, and a control unit that controls the laser irradiation unit separately between a first laser irradiation scan and a second laser irradiation scan, wherein when a first material region and a second material region are adjacently disposed in the shaped layer for one layer, the control unit irradiates the first material region with a laser in the first laser irradiation scan, and irradiates the second material region with a laser in the second laser irradiation scan.