1>和{141}<22>織構，過渡區(qū)的{225}<10>和{211}<01>織構，厚區(qū)的{876}<5>和{411}<01>織構。根據(jù)EBSD測試結果，建立了各厚度區(qū)的多晶體塑性有限元模型，研究了單向拉伸時各厚度區(qū)的晶?？棙媽葡甸_動情況和應力應變分布的影響規(guī)律。結果表明，薄區(qū)的{111}<01>織構和厚區(qū)的{876}<5>織構有利于滑移系的開動，開動的數(shù)量分別為9和8組，這使得等厚區(qū)在變形中的應力集中弱化，具有良好的塑性變形行為。而過渡區(qū)的{225}<10>、{211}<01>織構的晶?；葡甸_動較少，開動的數(shù)量分別為6和7組，導致應力集中，其塑性變形行為較差。差厚板各厚度區(qū)織構的差異導致其塑性變形呈現(xiàn)明顯的不均勻性，其斷裂位置發(fā)生在單軸拉伸時塑性變形較差的過渡區(qū)。;Different textures are formed in different thickness zones of CR340 tailor rolled blank (TRB) during rolling, including {111}<01> and {141}<22> textures in the thin zone, {225}<10> and {211}<01> textures in the transition zone, and {876}<5> and {411}<01> textures in the thick zone. The polycrystalline plastic finite element model in different thickness zones was established based on the results of EBSD test to study the influence of grain structure in different thickness zones on the activation of slip system and stress-strain distribution under uniaxial tension. The results show that the {111}<01> texture of thin zone and {876} <5> texture of thick zone are conducive to slip system activation, and 8 and 9 sets of slip systems are activated, respectively, which weaken stress concentration of equal thickness zone in the deformation process, so equal thickness zone has good plastic deformation behavior. However, the grain slip system of {225}<10> and {211}<01> textures in transition zone is less activated, and the number of activation is just 6 and 7, respectively, which lead to the high stress concentration, and thus the plastic deformation behavior is poor. The TRB presents obvious non-uniformity in plastic deformation because of the difference in texture of each thickness region, and the fracture position of the TRB appears in the transition zone with poor plastic deformation during uniaxial tension."/>