Study on microstructure and properties of Ni3Al/NiAl/Ni composite sheets and integrated process of reaction forming for thin-walled component
Aiming at the forming difficulty of Ni-Al intermetallic compound materials,the microstructure and properties and integrated process of reaction forming for Ni3Al/NiAl/Ni composite sheets were studied.Taking Ni/Al foil as the test material,the Ni3Al/NiAl/Ni composite sheets obtained by hot pressing composite method at 1200 ℃ and hot pressing time of 0.5、1、2 and 4 h was characterized by microstructure and uniaxial tensile tests at room temperature and high temperature(1000 ℃).According to the test results,the compos-ite sheets have better comprehensive mechanical properties after hot pressing reaction at 1200 ℃ for 1 h.The tensile strength and elonga-tion at room temperature are 527.6 MPa and 4.4％,respectively;and the tensile strength and elongation at 1000 ℃ are 165.7 MPa and 21.2％,respectively.Further research on the integrated process of reaction forming was carried out with these parameters,and the thin-walled conical cylinder shell with good surface quality and dimensional accuracy was prepared.The microstructure and mechanical proper-ties of thin-walled conical cylinder shell were characterized by sampling,it is found that the microstructure and mechanical properties of thin-walled conical cylinder shell are similar to those of the composite sheets prepared under the same process conditions.
Ni-Al alloyintegrated process of reaction formingthin-walled component
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