轧制方向对Ni_(47)Ti_(44)Nb_9锻造板,热轧板及冷轧板织构影响

Influence of Rolling Direction on Textures of Ni_(47)Ti_(44 )Nb_9 Forged, Hot-Rolled and Cold-Rolled Plates

采用XRD研究了Ni47Ti44Nb9锻造板坯织构、不同热轧、冷轧方向板材织构。研究表明,锻造板坯有典型的γ取向线织构,锻板心部最强取向在{111}<112>。沿轧向(RD)、交叉方向(CD)、横向(TD)热轧板织构类型相似,主要有3条取向线织构,接近{114}<uvw>、{223}<uvw>、{332}<uvw>(或{221}<uvw>),{332}<uvw>面织构取向密度最强,最强织构分别为{221}<110>、{332}<113>、{332}<023>,不出现γ-织构。沿与轧向成0o、45o、90o方向二次冷轧最强织构近似为{332}<110>。90o方向二次冷轧织构强度最高,有多个强织构组分,γ-织构得到显著加强。

Ni47Ti44Nb9 alloy plate texture has important influence on the shape memory property,so it is necessary to control the texture.The different rolling direction textures of the forged plate,the hot-rolled and the cold-rolled plates were investigated.Results show that the texture of the forged plate center presents a typical γ-fiber with a peak at { 111}〈112〉.The textures of the plate hot-rolled along rolling direction（RD）,cross direction（CD） and transverse direction（TD） mainly consist of three fiber types：{ll4},{223},{332} （or{221 }）,among them {332} has the strongest orientation density,and γ-fibre does not appear.The strongest textures of the plate hot-rolled along RD,CD and TD,are respectively {221}〈110〉,{332}〈113〉 and {332}〈023〉,respectively.The secondary cold-rolled plate along RD,0°,45° and 90° to RD,has approximately the strongest {332}〈110〉 texture.The secondary cold-rolling texture of 90 ° to RD has the highest orientation density,and the γ-fibre is significantly strengthened.