(中南工業(yè)大學(xué)材料科學(xué)與工程系，長沙 410083)
摘 要: 采用速率敏感晶體塑性理論，預(yù)測了面心立方金屬板材單軸拉伸過程中主要理想取向的穩(wěn)定性。結(jié)果表明，相對于拉伸坐標(biāo)系而言，穩(wěn)定性較好的理想取向，主要包括穩(wěn)定取向G{110}<001>T和亞穩(wěn)取向B{110}<112>T與S{123}<634>T，以及在不同初始塑性應(yīng)變比(R 值)條件下可能成為穩(wěn)定或亞穩(wěn)取向的Cu{112}<111>T與P{110}<111>T 和C{100}<001>T。取向RG{110}<110>T 和RCu{112}<110>T 的穩(wěn)定性較差。 理想取向所對應(yīng)的織構(gòu)組分的穩(wěn)定性與之相似。
關(guān)鍵字: 織構(gòu) 單軸拉伸 取向穩(wěn)定性 塑性應(yīng)變比 面心立方金屬
（Department of Materials Science and Engineering,Central South University of Technology, Changsha 410083, P. R. China）
Abstract:Orientation stability during uniaxial tension of face-centered cubic ( FCC) metal sheets is predicted using a rate-sensitive crystal plasticity model. The results demonstrated that referring to the tension coordinate system, orientation G{110}<001>T is stable, B{110}<112>T and S{123}<634>T are metastable, while RG{110}<110>T and RCu{112}<110>T are unstable. Orientations Cu{112}<111>T, P{110}<111>T and C{100}<001>T are stable or metastable depending on the initial plastic strain ratio (R value). The stabilities of texture components are similar to those of the corresponding ideal orientations.
Key words: texture uniaxial tension orientation stability plastic strain ratio FCC metals
