Experimental Investigation of the Phase Equilibria in the Al-Mn-Zn System at 400°C

Table 2

The actual compositions of the key samples and the detected phases.

Sample number	Actual composition identified by ICP (at%)			Phase identification		Composition of identified phases by EPMA (at%)
	Al	Mn	Zn	By; EPMA	By; XRD	Al	Mn	Zn
1	44	16	40	Al4Mn	Al4Mn	74	20	6
				𝜏1		64	15	21
				Al-fcc	Al-fcc	55	0	45
2	75	13	12	𝜏2	𝜏2	73	15	12
				Al4Mn	Al4Mn	74	20	6
				Al-fcc	Al-fcc	78	0	22
3	78	15	7	𝜏2	𝜏2	75	14	11
				Al4Mn	Al4Mn	75	20	5
				Al-fcc	Al-fcc	88	0	12
4	79	10	11	𝜏2	𝜏2	72	16	12
				Al4Mn	Al4Mn	76	20	4
				Al-fcc	Al-fcc	79	0	21
5	74	16	10	𝜏2	𝜏2	73	15	12
				Al4Mn	Al4Mn	74	20	6
				Al-fcc	Al-fcc	75	0	25
6	74	15	11	𝜏2	𝜏2	72	15	13
				Al4Mn	Al4Mn	74	20	6
				Al-fcc	Al-fcc	80	0	20
7	84	12	4	Al6Mn	Al6Mn	86	14	0
				Al4Mn	Al4Mn	75	20	5
				Al-fcc	Al-fcc	95	0	5
8	82	11	7	Al12Mn		92	8	0
				Al6Mn		83	15	2
				Al-fcc		96	0	4
9	21	14	65	𝜏3		12	11	77
				Al11Mn4	Al11Mn4	70	26	3
				Al8Mn5	Al8Mn5	56	37	7
10	16	14	70	𝜏3		12	11	77
				𝜏4		23	16	61
				Al11Mn4	Al11Mn4	71	25	4
11	23	16	61	𝜏3		13	13	74
				𝜏4		25	18	57
				Al11Mn4	Al11Mn4	69	27	4
				Al8Mn5	Al8Mn5	55	36	9
12	17	15	68	Al11Mn4	Al11Mn4	70	26	4
				𝜏3		13	11	76
				𝜏4		23	16	61
13	18	22	60	𝜏3		10	15	75
				Al8Mn5	Al8Mn5	52–57	33–37	10–11
14	64	31	5	Al11Mn4	Al11Mn4	70	26	4
				Al8Mn5	Al8Mn5	55	34	10
15	56	37	7	Al8Mn5	Al8Mn5	57	39	4
16	55	35	10	Al11Mn4	Al11Mn4	70	27	3
				Al8Mn5	Al8Mn5	57	34	9
17	30	35	35	Al8Mn5		54	38	8
				𝜀		74	22	4